Clogged Tube – If your tube of caulk becomes clogged by dried caulk from the last time you used it, you may not have to throw it out. You can actually fix this minor inconvenience quite easily. Take the tube and cut off the nozzle end so that the hole is slightly larger than the first cut. Next, drive a screw into the nozzle end of the hardened caulk and use the screw to pull the hardened caulk out of the nozzle. A screw with coarse threads, such as drywall or deck screws, will work the best.
Just another expert idea from Guy Calor, the Caulk King and CaulkWarmer