Cleaners and products

What each cleaner is for, which materials it is safe on and where it will do damage.

Biological laundry detergent Ordinary washing detergent with enzymes added, and the one household product that breaks protein apart rather than wash...
Hydrogen peroxide A mild oxidiser that destroys the colour in a blood mark rather than lifting it out, and that lightens whatever it is s...
Washing-up liquid Ordinary hand dishwashing liquid can help lift oily residue. Suitability depends on the actual product and the material...
White vinegar A weak acid that helps with tannin and mineral marks, is genuinely useful diluted on carpet and fabric, and permanently...