- clean the nozzle after each use.
- Store the tube with the nozzle pointing up. This tends to drain the glue away from the nozzle tip.
- If the nozzle gets clogged, you can drill through the clot using a cordless drill with a small drill bit. While you're drilling, make sure not to compress the tube.
These measures allow me to consistently use the entire bottle of glue over a period of 1-2 years.