Well, after visiting the in-laws and being gone for more than 24 hours, I finally had to re-light the Quad. Technically I could have revived the few coals I had left, but I decided a full ash clean-out was more useful. 6 weeks of 24/7 and all of that subzero weather: she sure got a good work out How long do you folks go between lights? All I know is it sure saves on kindling!