I run mine dry and it will stay where I park it. I put a alum pie tin in for a drip pan once and it gave me fits holding temp. Once I pulled it out, .. Viola, right back to 300. I have found that if I really fill it up( the MIni) my temps drop because of a cold meat load, I don't touch a thing just let it be it bounces back in an hr or so.
I'm a Proxy Vegetarian> Cows eat grass & I eat cows.