I used the normal off the shelf hydrogen peroxide from the local drug store...as I said earlier, it worked great for me. It may work even better with the other stuff phantombuck, but I had good luck. It's my understanding that the hydrogen peroxide works its way out anyway which is the reason to leave the lid loose for a few days. I guess its needed to kick off some chemical reaction but then its gone. leave the lid loose for several days....last year I closed mine up after a day and the pressure built up and the stuff came oozing out while it was in the garage and went all over the place!