I also have had this problem too pyle. I just bought a can of Colemans and my 4.3 hicapa vents all the gas out and i get that white film as well. I was wondering what the hell happened, i took out the internals as well and lubed em up and double checked to make sure that nothing was loose, and it still did it.
Only problem now is Someother companies their threads aren't very friendly to my adapter. They can be a real bitch to screw on. and somtimes the nozzle doesn't stay in, always falls out.
What other companies do you guys recommend if Coleman isn't working anymore?