I just bought a frog togg cooling towel last week and cut it in half because it was too big. It worked great at first. By Friday it was really dirty and starting to smell sweaty so I tossed it in the washing machine over the weekend (twice) as it says to on the packaging. Washing it didn't get it clean in appearance--it still looked dirty only after washing it the towel stopped being cold when adding water. I then busted out the other half and it works. For the Frog Toggers, do you just buy a new one every 2 weeks or what?