Hi guys, Just looking for peoples experiences and opinions.. I'm just about to stick my skirts on with instastik and doubt that i'll use the whole can to do it. If you've only used say half a can and wont be using it for a few days do people remove the instastik cartridge after using it and then clean the gun straight away? or do you just leave the can on the gun without cleaning anything? (the can says to leave it attached to the gun however wouldnt the foam just cure inside the gun?