I bought a pair of Equalizer Suction Cups a few years ago. They work great. Recently they have started to " slip " a little bit. My question is this. The kit came with a bottle of something called "Glycerin ". No instructions on how to use this. Even the video that came with the kit did not address this. Do you know the best way to apply this and is there any thing I can do right now that will improve the suction on these  ft. laud 7/14/01

Take the plunger assembly apart and the glycerin goes on the rubber o ring seals...They have probably dried up and they need to be rejuvenated....I do my set about every 6 months and they can suck the ocean dry with one pump (smile).  FXS