The same cleaning product that brewers love, but in an easy to dissolve liquid format. PBW is non hazardous buffered alkaline brewer cleaner. It's the cleaner of choice for many breweries, where it out performs more hazardous caustic chemicals without removing the flesh off your bones. PBW will also not corrode soft metals. It's effectiveness and ease of use has made it a go to cleaning chemical for pros and homebrewers alike. Add 1-2 oz per gallon of water, in temp range of 50F - 170F. Then Rinse after soaking.