Jim, what I did was sleep with the canister then stick a chemical toe warmer to side of canister, and place canister in the top of a sock. This has always worked for me.
John
That ought to work.
Something to try though: run it with the canister inverted. You can do it on a WindPro (doesn't necessarily work with all stoves). Start with the flame low, let the stove warm up a bit, and then invert the canister. You should get better pressure toward the end of the life of the canister.
HJ