There was some post with someone asking how to clean their iron grates on the stove. BDL said to soak them overnight in a plastic bag in ammonia (no detergent, no water). We had always followed our user's manual and soaked them in water with some ammonia and dish detergent. We also soaked them overnight. Then we would spend and hour scrubbing all the stuff off. Anyway, after soaking them the "BDL way" overnight, my wife (yes, I also do this duty - it was her turn) started out with the brush and everything just came right off! Sparkling clean in less than a minute of almost effortless brushing.
So thanks to BDL for the great cleaning tip!