<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by Rita Y:
I think Weber recommends that you shut down your grill when you are finished cooking and without cleaning it at that point. Sometimes I just give it a light brushing to knock off any largeish pieces of food. The greasy coating will protect it until you're ready to cook again. My theory is that during the cool-down, the grease on the grates might start to form sort of a nonstick coating, much like a cast-iron skillet. Then, when you're ready to cook, preheat the grill on high for 15 minutes. Only then do you scrub the grates.
I've had SS grates on my gasser for 2 or 3 years now and they usually come perfectly clean (not shiny, though) using this process.
As you all know, the trick is to oil your food, not the grill, before placing the food on the grill and not moving the food until it has a pretty decent sear. It will release when it is ready to be released.
I haven't tried the cast iron grates yet, but I really like my stainless ones. Wish there was a Rent-A-Grate around here so I could play with the cast iron grates a little.
Rita </div></BLOCKQUOTE>
What Rita says. It's possible to be to "clean crazy". I was on wire racks. Never was on cast iron. Treat them the same. Right after the cook while they are still hot wire brush them until all the cooking material is off. Use leather gloves to keep from burning your self. Then wipe with oil and let them cool down that way. You'll get a seasoning or coating of hardened oil which will help protect them from rusting. By over cleaning wire grates you keep them "sticky". You need a seasoning or baked on residue to help them become non-stick.
I'm with Bryan - I don't think you have stainless steel? If you actually do the grill stone is placing scratches in them and without any seasoning they will stick.
Anyway the key is to brush off while still warm/hot. If you still have clumps, crank up the heat and close the grill for about 20 minutes, wire brush, let them cool a little and then wipe with oil and let them cool down.
Making your wire racks shiny keeps them sticky.
At least that's been my experience.