It seems like a brilliant idea:
Take the gunked-up grate from your grill and clean it on the self-clean cycle of the oven or in the dishwasher.
Not so fast. Those so-called brilliant ideas — which have been floating around the Internet and on various blogs — could be a good way to ruin your dishwasher or fill your kitchen with eye-burning fumes, smoke or even flames, say the experts.
We asked the grill gurus at Weber and the Whirlpool Institute of Kitchen Science about both these unwise schemes.
Steve Swayne, in charge of cooking performance for Whirlpool, says putting a grease-caked grill in the oven on the self-clean cycle is a good way to start a fire.
"The gunk that collects on your grates is mostly grease and it becomes combustible at high temperatures. You're risking lots of smoke and maybe fire," he says. At the very least, he notes, the oven will be left a mess, and there could be permanent staining from all the soot.
Putting those greasy grates in the dishwasher is also a bad idea — it can clog and ruin the appliance, say the experts at Whirlpool.
Full article: http://www.aarp.org/food/cooking/info-07-2010/tips_to_clean_grimy_grill_grates.html
Post from another forum…
OK so this is weird. I was at the doctor's yesterday reading one of the home owner type magazines and this little article attracts my eye. It was a retraction from the magazine that had offered the advice of cleaning your BBQ grates in the self cleaning oven. Apparently many self cleaning ovens can't be opened and stopped once the process begins. The house would fill with smoke and it was a mess. The magazine was apologizing for the advice.