We found DE at the farm supply store. Bit expensive. 8.99 for a 4lb bag, but we got some and are going to try it out tonight. Now, when you rub it on your pet, do you just leave it on there, or do you have to wash it off? When its on the carpet, do you just vacuum it up after 2 days. (it says to wait 2 days for it to kill all the fleas)