John, to clear the nozzle on the NEW big nozzles is "self cleaning". When you let up on the nozzle there is an "air burst" that is suppose to come out last and clear it. No turning the can up side down.
Right after I got a new can, with the new nozzle, I was trying to BARELY press the nozzle for just a little tweak at one small spot I needed some primer. Well, danged, I must have had just the right touch on it that day because as I "barely" mashed the nozzle I could hear the air come out but no paint....until I pressed it farther down. I've tried to duplicate this again but just can't quite do it............