My dear daughter is part 19, part 9 and part 29.
She is ONLY 19.
I can understand the frustration and conflict of emotions with your adult daughter.
On the bright side I think you will notice that in the next couple of years she will be growing up a lot.
Did you tell her she ruined it? Show her it was a mess now?
I don't think she could have really known it was the special towel, but you can make a point now. (Although part of me thinks 19 is definitely old enough to know the grubby brown hand towel, from the fancy lace display towel.)