If you don't want to empty the entire can. Use a small drill bit and drill out the insert in the tip. Insert one of those plastic straws that usually come on other spray cans like WD-40. I was able to buy several of these somewhere.Insert this into the hole in the tip and epoxy this in place. When everything is dry,put tip on can and spray into jar. This is a super way to do this and if you save the tip and straw you won't have to do this again. I clean the assembly by using a pipette filled with lacquer thinner and push it thru from the bottom of the tip.