I have used Citrasolv to remove Silly Putty from carpet - it worked great on the carpet, I would assume it would work on cotton too. It is an all natural product, available in natural/organic food stores. It also took some automotive grease out of the carpet - my landlord was amazed!! Good luck!! Amy Grace
Farmgirl #224 "use it up, wear it out, make it do, or do without"