I was wondering why some people experience the glue drying out in the bottle, while I have never had that happen. I think the reason is accidental: I store the glue bottle upside down, so I don't have to wait so long for the glue to get to the spout. I think that in storing it upside down, it also probably accomplishes the purpose of keeping the glue near the spout away from air, so it doesn't dry out. I find that in storing it upside down, glue hardens around the threads after a while so I can't screw the cap on, but a nail pushed into the hole works just as well, maybe even better, as it keeps the hole open for the glue to move through.