yes great tip, i did notice that its the rubber that gets jammed on the aggressive
tank crackers. been lubing the plungers with pg, but hadnt done the air barrier trick, gotta try that air thing and switch to vg for lube. I just cant wait to get around to ordering a decent digital scale so I can finally say goodbye to syringe hassles. Its the only way to fly imho.
Anyway, it makes me wonder if theres an issue to worry about in regard to whether or not using glass dropper bottles is really the best option for storing and despensing
tank cracker juices. These bottles have a rubber bulb and cap seal, most of the amber glass bottles have black rubber similar to the syringe plungers and some (the cobalt blue ones) have a white rubber bulb/seal. I'm thinking the white rubber would probably be a better choice but have very mixed feelings about whether or not these aggressive juices are leeching anything out of this rubber. Obviously the mixed juices arent anywhere near as aggressive as the flavor concentrates, but aggressive enough to attack some plastics.
So the big quandry being... maybe there's less chance of having anything leech into the
juice if we just stick with the standard poly plastic squeeze bottles with the narrow poly eyedropper tips.
I suppose the best way for the extra paranoid approach is to store in glass with a (dry) polycone cap instead of the eyedropper cap, and dispense with a glass dropper. Not very practical in practice obviously.