Tootsall

Rowuk... CLR is a liquid cleaner that removes "Calcium, Lime & Rust" from places like around toilets, drains, chrome, tile, etc. Some guys like to use it to remove the various oxides and buildups inside horns.

Sold at most department stores near you IF you are in N.A.

My point in asking if the service shop was part of a major chain or not is because MOST "Mom and Pop" music shops in Canada will NOT have an ultrasonic cleaner.