Well, we used to dry burn the (now old) CE2's when new because there was a mystery fluid on them..
I think the key w/ dry burns is to not overdo it; use quick pulses. If you see 'smoke' burning off there's probably something on it. If so, I'd give it a Vodka bath and let it dry some. Heck, I'd probably do that anyway knowing the past w/ the CE2's and mystery fluid.