help with washcloth centers turning dark gray
I have an Asko front loader and wash all my washcloths & towels on high heat. For over a year every washcloth soon ends up with a big dark gray center, worse when held up to a light.
NOTE: I do not wear any makeup nor does anyone living/staying here. I do not use tooth whitener. I do not clean with the washcloths, only shower or wash my face. I use Purpose face cleanser (pure) but I do use the Aveeno shower gel that is lavender scented and comes out of the bottle white. I use Tide HD Free and run them on 7 rinses in the Asko and dry in the dryer.
Any ideas? I am stumped and tired of buying new ones only to see them all end up the same way. This has really been going on through about 5 packs of washcloths, some white, some cream. They are from various makers.