The auto shutoff might change as we figure out what it should be. This thing can climb above 1000F and torch anything that falls into it... so the right thing to do is give it an auto shutoff. We set it at 20 minutes at first, but it would annoyingly shut off the moment we came back for our second hit. So we set it to 30 min but it became too hot to touch. It's OK to run at full temperature forever - all components will handle the heat buildup indefinitely. So it just needs you to cycle the knob here and there if you're still using it. The included warranty allows for free upgrades any time they are available, so I'm pretty sure your shutoff time could be adjusted by us if you want. Would need to check on that.