In the past year or so I haven’t had much luck clearing paint from spray can nozzles. Used to be you’d turn the can upside down and spray for 5 seconds until only propellant came out. Now a lot of cans just keep spraying paint no matter how long you hold the nozzle in.
I’ve started removing the spray nozzle when done and putting it in a small cup, smaller than a shot glass. Then pour a little lacquer thinner in, swirl & cover. Haven’t had a clogged nozzle since.