My buddy introduced me to zap gap years ago back in the 80s. One day we were working on kits and he was upset that his bottle had solidified and saying it wasn't even that old and he had plugged it with a pin. I said that was the problem with mine I never get even half way and it hardens up. So we went to the 99 cents store and bought those glue kits with those small tubes like four to six. I really like using those I have tubes that are four years old and the glue is still good till I break the seal my biggest problem is the pin or cap gluing solid and I can't get them off or wreck the tube doing so, but they were cheap so no biggie. Anyway I just wanted to suggest this for guys that may have the same problems with not getting full advantage of their zap gap before it hardens
Lol, still,have a few tubes from four years ago they were so cheap I bought like three or four packs gave at least one to my friend and put the others in my tool box.