How long does your torch lighter last before you have to refill it? I have a Xikar Executive that I really like but it doesn't last long on a tank of butane. I usually only get 3 or 4 cigars out of it. I completely purge it everytime I refill it. I don't ever get any blowback when filling it either. I'm thinking maybe I'm not filling it completely. Can anyone else that has an Executive offer some advice.

Thanks!