I have read about people using pine shavings and since I use those for chicken and pet bedding, I thought it would be a good fuel. When I first starting using it, for some reason, it would not stay smoking for a long period of time and I really didn't know why. I realized later that I really had to pack that stuff in there once I got it started. I thought it would put out the embers, but no. It's kind of amazing how much of that I can stick in a smoker. Anyway, once I started doing that, that sucker stays lit for a long time after I'm done in the hives.