I have been Egging for over five years now. I have encouraged many folks to invest in the Egg and all are most pleased. Recently, one of my friends here in Florida and my nephew who lives at 8000 ft in Colorado both presented the same problem. They can't seem to get their Eggs above 400 degrees. I asked the normal questions; is your egg cleaned out? Is your gasket in good shape? All answers were, yes. If you live in Colorado and are reading this post, do you have a similar problem? It is beyond me why they can't get higher temps. All are using good and dry lump. Ok, Egg people, let's get these folks an answer.