Hard water build-up accumulates on washcloths and towels and leaves discoloured areas of residue when you have a high mineral content in your water. Hard water build-up is often a problem when you wash a batch of towels, as the wash cycle leaves behind the residue that is difficult to remove. To prevent this build-up from damaging your towels and washcloths, add white vinegar to your wash cycle.
Place your towels and washcloths into the washing machine. Set the machine for warm-water wash and a large load. The large-load setting enables items to move freely.
Pour in your normal portion of washing powder and add 1 cup of white vinegar as well. The vinegar naturally breaks up hard water build-up and prevents the build-up from depositing on the items during the wash cycle. The vinegar also works well as a deodorising agent that is safe for both white and coloured towels and washcloths.
Let the cycle run as usual and dry the towels and washcloths when the cycle completes. Add a cup of vinegar to the wash cycle for all items, not just towels and washcloths, when they accumulate hard water build-up.