My 26" OTG has been neglected for at least two years. Since it's just my wife and I most of the time I don't need it that much and typically use the Smokey Joe or the ES-310 I just picked up last year. Anyhow I uncovered it this weekend and found I'd cleaned out all the ash but left a bit of half spent charcoal in it, maybe a third of a chimney. I used that plus a couple more fresh chimneys to burn it out good for a few hours and then made burgers on it that night. If it weren't for all the fuel I'd use it more often, those were great burgers!