Hate finding your spray can won't? 

Here is a little trick to solve the problem.  Get a plastic bottle and add a bit of fuel tube.  After spraying and doing the inverted spray thing to clear the inner tube of the can, pull off the nozzle and slip in into the fuel tube as shown.  Immerse the nozzle in thinner and suck the thinner through it in and out for a few times. 

End of problem! 

If there is gunk in the bottom of the tube in the can, it often can be cleared out, but it's gonna be a messy job.

Take an old spray nozzle and remove the orofice plug.  Invert the can inside a garbage can, cardboard box or your neighbor's garage (the one who'se dog "visits" your yard).  Push the button, Max!