I've had my microfiber towel for about 15 years and all I do is wash with regular towels or whites, hot wash maybe a little bleach and no fabric softener. The fabric softener makes the towel much less absorbent, but if you forget and add softener it will just wash out next time you wash it. Even though it is a soft towel, do not rub your hair with it. Just thought I'd add that last bit but you probably already know that.
Bookmarks