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When I want the egg to get hot (700 ish) I DONT fill it up with coal. More coal = less air flow= less heat. I fill it up about halfway with nice big chunks and I've never had a problem. A buddy of mine had the exact same problem your having, I went to his house, removed about half his coal, and in 10 minutes we were pegged out. Trust me on this one.
The absolute worst lump ive ever used. Sparked horribly, left my food tasting like soot, etc.. Will never....ever buy again. I honestly wouldn't use it again even if someone gave it to me. Other than that, I like it. I will stick with Royal Oak.