On another thread, I was confessing how I used the hotel white towels to remove makeup. I don’t like makeup remover towelettes and won’t use them except for camping. 
I did mention that no matter how much make up I take off, I always rinse the edge of the towel with hot water and some soap and it all comes right out. Not a trace is left in the white towel.
Anyone who doesn’t try to do that is lazy and disrespectful.
You might have to put up a sign.
Towels stained and ruined with make up will be charged to the guest.