The Stain Library

How to remove deodorant marks from cotton

  • DifficultyEasy
  • OutlookOften removable
  • MaterialCotton
  • Reviewed1 September 2026

The short answer

Rub a fresh white mark off dry with a cloth or a pair of tights before you put anything wet on it. For yellowed underarms, work neat washing up liquid or a bicarbonate paste into the damp fabric, leave it an hour, then wash at the care label temperature and air dry. Keep it out of the tumble dryer until the mark has completely gone, and do not use chlorine bleach on the yellowing.

If it has just happened

If it is white and chalky, rub it off dry with a folded cloth in short strokes. If it is yellow and stiff, take the item off and do not put it back on or in the dryer. Get it wet and leave it wet until you can treat it properly.

Heat can set this stain permanently

Do not use hot water, a tumble dryer, an iron or a steam cleaner until the mark has gone. Heat fixes this type of stain into the fibres and makes it far harder to shift.

Test on a hidden area first

Try any cleaner on a hidden part of the material first, such as a seam, an offcut, inside a hem or under a piece of furniture. Wait for it to dry and check for colour change before treating the visible mark.

Keep every source of heat away until it has gone

This includes the tumble dryer, the iron, a steamer, a hot wash and a radiator. Heat does two things to a deodorant mark at once: it drives the residue further into the material, and it speeds up the reaction between the aluminium salts and the proteins in sweat that produces the yellowing. Check the mark while the item is still wet, in daylight, before anything warm goes near it.

What you will need

  • Two clean dry cloths White, so no dye transfers into the fabric.
  • Washing up liquid Neat, worked into the damp mark.

Helpful but not essential

  • A pair of old tights Better than a cloth on fresh white transfer.
  • Bicarbonate of soda Three parts powder to one part water makes the paste.
  • Biological laundry detergent The enzymes work on the protein half of the build up.
  • Oxygen based laundry soak White cotton only, and used cool rather than hot.

Fresh deodorant on cotton

A white mark that has just transferred is deposit sitting on the weave, and it comes off dry.

  1. Rub it off dry, before anything else

    Fold a clean dry cloth, or use a pair of tights, and rub the white deposit with short strokes in one direction. Most fresh transfer lifts off completely at this stage. Do not wet it first: water dissolves the waxy carrier and spreads a surface deposit into the weave, which is how a ten second job becomes a soak.

  2. Check it in daylight

    Hold the fabric to a window. Fresh transfer that has lifted leaves nothing behind. If a faint greasy shadow remains, that is the waxy carrier and it needs the next step.

  3. Work in a little detergent

    Put a small amount of washing up liquid directly on the shadow, work it in with your fingertips for about thirty seconds, then rinse it through with warm water from the back of the fabric.

  4. Wash at the label temperature

    Wash as normal, then look at the underarm while the garment is still wet. Air dry it rather than tumble drying, until you are certain nothing is left.

  • How longUnder five minutes, plus a normal wash
  • RepeatingRub in one direction rather than harder. Three passes is plenty.
  • Stop ifthe white deposit has gone and the weave looks clean in daylight, or the fabric surface starts to fluff

Dried deodorant on cotton

A mark left through a few wearings has started to build up but has not yet yellowed hard. This is the point where it still comes out reliably.

  1. Wet the underarm and work detergent in

    Hold the underarm under warm running water, then work neat washing up liquid into it with your fingers or a soft brush from both faces of the fabric. The waxy component is what makes the area feel slightly stiff, and detergent is what lifts it.

  2. Leave it to sit

    Give it at least thirty minutes with the detergent on it. This is not an active step and it is the one people skip.

  3. Soak in biological detergent

    Submerge the whole item in cool water with a dose of biological detergent and leave it for an hour. The enzymes act on the protein part of the build up, which plain detergent does not touch.

  4. Wash and air dry

    Wash at the care label temperature, check the underarm while it is wet, and dry it on a line or an airer.

  • How longAn hour of soaking, plus a wash
  • RepeatingOne repeat soak is normal. Stop after two that change nothing.
  • Stop ifthe fabric feels soft again rather than stiff, or two soaks make no visible difference

Old or set in deodorant on cotton

Yellowed, stiff and still there after washing. Expectations should come down here, and the method changes from detergent to time.

Rinse the bicarbonate out completely

Bicarbonate of soda left in the weave dries to a fine white powder that looks very like the deodorant mark you were removing, and it attracts soil. Rinse until the water coming off is clear and the fabric does not feel gritty.

  1. Make a bicarbonate paste and leave it on

    Mix three parts bicarbonate of soda to one part water into a thick paste, spread it over the yellowed area on both faces, and leave it for two hours. Work it in gently with a soft brush before you rinse it, and rinse until the water runs clear.

  2. Soak overnight in biological detergent

    Dissolve biological detergent in cool water at the dose on the pack and leave the whole item submerged overnight. Cool, not warm: warm water helps the enzymes a little and sets the mark a great deal.

  3. Assess it honestly while wet

    Rinse and look at the underarm wet and in daylight. A mark that has lightened will usually lighten further with a second soak. One that has not moved at all after a full night is unlikely to move later.

  4. On white cotton only, an oxygen soak

    If the item is white, soak it for four hours in cool water with an oxygen based laundry soak at the dose on the pack. This works on the colour of the mark rather than the build up, so it goes after the enzyme soak rather than instead of it. Then wash and air dry.

  • How longFour hours to overnight, plus a wash
  • RepeatingTwo long soaks, then stop. A third does more harm to the fabric than good to the mark.
  • Stop ifthe fabric thins or loses colour, or two long soaks leave the mark looking the same

What not to use on cotton

  • The tumble dryer or an iron before the mark has gone

    Heat and the aluminium compound together set the residue into the fibre and accelerate the yellowing reaction. Textile guidance is explicit that heat applied to a deodorant stain ruins most fabrics, and a mark that has been through a hot dryer is far harder to shift.

  • Chlorine bleach on a yellowed underarm

    It reacts with the aluminium and protein build up and turns the mark darker and yellower rather than removing it, and it weakens the fibre at the most worn part of the garment. Bleach with vinegar also releases chlorine gas, and vinegar is the usual treatment for this stain.

  • Wetting a fresh white mark before rubbing it

    The white part is wax and salt sitting on the surface. Water dissolves the wax and carries it into the weave, turning something that would have brushed off into a stain that needs treating.

  • Scrubbing a wet underarm hard with a stiff brush

    The underarm is the most abraded part of a shirt already. A stiff brush on wet cotton fluffs the surface fibres, and the fluffed patch catches light differently for the life of the garment.

White compared with coloured cotton

On white cotton the full range is available, including an oxygen based soak once the build up has been broken down. On coloured and dark cotton, keep to detergent, a bicarbonate paste and an enzyme soak. Oxidisers of any kind lift dye as readily as they lift the mark, and the underarm of a dark t-shirt is a conspicuous place for a pale patch. Test anything stronger than detergent on an inside seam and let it dry fully before you judge it.

If the mark is still there

If a shadow remains after one soak and a wash, soak the whole item again overnight in cold water with a full dose of biological detergent and wash it again. Two soaks is a reasonable amount of effort.

If two consecutive soaks change nothing, the build up has been in the fibre a long time. On white cotton, an oxygen based laundry soak used at the dose on the pack is the remaining option, and it works on the colour of the mark rather than the deposit. Give it four hours in cool water, not hot.

On coloured cotton there is no equivalent, and a mark that has survived an enzyme soak and a wash is probably permanent. Cotton that has gone stiff and slightly amber at the underarm and stayed that way is telling you the fibre itself has changed, and no further soaking reverses that.

When to stop and call someone

Take a shirt to a cleaner rather than repeating home treatments if it is tailored, if the fabric at the underarm has gone stiff and thin, or if it is a garment you would not risk a pale patch on. Stop and get advice if the weave starts to look thin or open at the armhole, which means the fibre is going rather than the mark.

Why deodorant behaves this way on cotton

Cotton is cellulose, and it holds nothing chemically against either half of a deodorant mark. That is why the fresh white deposit lifts off the surface so easily and why a soak reaches build up that has gone deeper.

The white part is aluminium salt plus the waxy solids that carry it. Those are sitting on top of the weave, held there mechanically, and mechanical removal takes them off. Wetting them first dissolves the wax into the fibre and makes the job harder.

The yellow part is a different substance. Aluminium salts in contact with sweat react with its proteins and salts and the product bonds into the cellulose. A mild acid or an enzyme breaks that down given time, which is why every method that works on it is measured in hours.

Heat is what makes it permanent. Cotton takes a hot wash perfectly well, but the mark does not: heat drives the residue in and accelerates the yellowing, and cotton that has been dried hot with build up in it comes out stiff and darker.

Do the usual suggestions work?

  • A dry cloth or a pair of tights Yes, it works

    On fresh white transfer this is the whole answer, and it is what manufacturers and dry cleaners both recommend first.

  • White vinegar soak Sometimes

    Genuinely useful on yellow build up, given an hour or more rather than a wipe. Does nothing worthwhile on a fresh white mark.

  • Bicarbonate of soda paste Sometimes

    Mildly alkaline and mildly abrasive, so it does some work on build up. Slower than an acid soak and it has to be rinsed out completely.

  • Chlorine bleach on the yellowing No, it is risky

    Reacts with the build up and darkens it, and weakens the fibre. This is the most common way a white shirt is finished off.

  • An oxygen based laundry soak Sometimes

    Useful on white cotton after the build up has been broken down. It addresses the colour, not the deposit, so it works second rather than first.

  • Crushed aspirin paste Sometimes

    Aspirin is acetylsalicylic acid, so this is a weak acid soak with extra steps. White cotton only, and white vinegar does the same job more cheaply.

Common questions

The mark came out but the fabric is still stiff.

That is the waxy carrier rather than the stain. Work neat washing up liquid into the dry area, leave it thirty minutes, then wash again. Stiffness that survives that is usually aluminium build up in the fibre, and it softens over several washes rather than one.

Can I use a hot wash if the care label allows it?

Not until the mark has gone. The label temperature is about what the cotton tolerates, not what the stain tolerates. Once the underarm is clean, wash it as hot as the label allows.

Why does it only happen on some shirts?

Build up needs many wearings in contact with skin, so it appears on the shirts you wear most. Aluminium free deodorants do not produce it at all, which is a straightforward way to test whether that is what you are dealing with.

Sources

What we checked and when. Where a manufacturer instruction disagrees with anything here, follow the manufacturer.

  1. Antiperspirant and deodorant stain removal, University of Georgia Extension authority

    University extension textiles guidance that deodorants and antiperspirants contain acidic aluminium compounds which change fabric colour, that undiluted hand dishwashing detergent rubbed into the mark and then laundered is the first method, and an explicit instruction never to iron or apply heat to a material carrying a deodorant stain because the chemical and the heat together ruin most fabrics.

    Checked 1 September 2026

  2. Sweat, deodorant and yellow underarm stains on dress shirts, Vogue Cleaners specialist

    Dry cleaner statement that the yellow is a reaction between the proteins and salts in sweat and the aluminium compounds in antiperspirant rather than sweat alone, that chlorine bleach reacts with that build up and turns the mark darker and yellower while weakening the fibres, and that dryer heat sets whatever the wash left behind so marks that have been through a hot dryer are far harder and some never fully clear.

    Checked 1 September 2026

  3. How to remove deodorant stains from clothes, Persil UK manufacturer

    Manufacturer methods for deodorant marks: a bicarbonate of soda paste at roughly three parts powder to one part water left on the mark for a couple of hours, a white vinegar soak of about an hour worked with a soft toothbrush which they state suits both white and coloured fabric, and neat laundry detergent rubbed in before washing. Also advises letting antiperspirant dry fully before dressing.

    Checked 1 September 2026

  4. How to remove deodorant stains from clothes, Sure UK manufacturer

    Antiperspirant manufacturer stating that deodorant stains are primarily caused by the aluminium salts in antiperspirants reacting with perspiration and fabric to leave chalky white marks at the underarm, and giving bar soap worked with a soft bristled brush on both sides of the fabric, and a bicarbonate of soda paste tested on a hidden area first, as the two household methods.

    Checked 1 September 2026

  5. What causes white marks from deodorants, The Beauty Brains specialist

    Cosmetic chemists explaining that the chalky white marks come from two separate sources: aluminium chlorohydrate and aluminium zirconium salts drying out on the fabric, and the white waxy carriers used to deliver the active in stick formats, named as sodium stearate, stearyl alcohol and glyceryl stearate.

    Checked 1 September 2026