Salvation for clogged nozzles
Nozzles on spray-adhesive cans tend to clog up. Turning the cans upside down after each spraying session and spraying for a few seconds helps, but tips can still clog. To salvage half-empty cans of spray, try soaking the nozzles for 5 minutes in lacquer thinner in a small can or glass such as a baby-food jar. Then wipe the nozzle clean and reinstall it on the spray can. Take an added step against clogs and buildup by wiping a small amount of petroleum jelly on the outside of the nozzle before you store the can.
—from the WOOD® shop