great stuff, hard to apply
This stuff removed YEARS worth of buildup in an hour or so. Really worked, but the packaging could be improved. The bong-like bottle is gimmicky and not very functional. This stuff would be awesome if it came in a squeeze bottle, with a nozzle that could squirt the thick liquid down into the tubes and holes. It is very thick and a little tricky to get all around the inside, but well worth the effort.