Ahh-Some Bio and Gunk CleanerAhh Some Hot Tub Bio and Gunk Cleaner The Ahh Some Plumbing and Jet cleaner is designed for use in hot tubs and jetted tubs and will remove surface grit, oils and other hard to remove gunk that can accumulate during the manufacturing process on new hot tub or over time as it is being used. Bio and Gunk Cleaner Features: Cleans and removes built up oils, lotions, and other contaminants For use in hot tub and jetted tubs Cleans surface, plumbing, jets