Pro said it...

Ronson, purge properly (valve facing up AND valve facing down), clean the head periodically.

I used to believe I needed "better" butane but since I started following the 3 rules I've had no trouble even using Ronson butane.

Only thing is I do not go to Wally so I pay $4.50 per Ronson.

I've never had a problem with these and usually get them here for $7 - artic or black out.

http://www.cigarbid.com/Auction/Lot/1899988/Black-Ops-Alpha-Double-Torch-Lighter-Arctic/ 

RY