When I was in college, we trashed the carpet in our apt. Fearing we would lose the deposit, we decided to dye it dark green so the landlord would not notice. We figured he was too absentminded to know what carpet colors he used. It worked great with one problem. Everyone that came over that month had green feet for about 2 months...that stuff would not scrub off..just had to wear off. We got the deposit back :sad: