Mislaunder

He notes that while a good quality hotel towel is good for 250-300 washings, most "don't reach the end of their life cycle" because they are either taken by hotel guests as "souvenirs" or are mislaundered.

Nylon's natural hue is grayish and it will revert if mislaundered.

Many manufacturers, wanting to carry the least amount of liability or responsibility for mislaundering, slap on a “dry clean only” tag to cover themselves.