Thanks a lot for the heads-up!!! I thought that given the very strict change re fluorocarbon use, that the difluoroethane now used would evaporate off. I forgot about the bitters that are added to prevent idiots from huffing the stuff; those bitters leave a residue. Too bad, looked promising for instant evaporation. I won't be using that again. Thx again! Tip: With some glass pieces, if you vertically submerge, air may be trapped and the solution unable to reach that area. With my Hydraline for example, I have to tip the container ~15 degrees for the air bubble to get free. Not sure about this and your stemless piece. Tip: Just for when you lift the piece out the first time, be careful about how it drains. A change in water level between inside the tube and the outside stem could result in overflow thru the joint, depending on the piece.