On Fri, 29 May 2015 08:26:26 -0400, Art Todesco
wrote:

I've used oven cleaner "cold" on many things including pots & pans and
on oven grates. Works good. Many oven cleaners say that they work hot
of cold, they just take a little longer cold.

+1 I (we) get the oven cleaner from the Dollar Store. Spray smoker
grates that are cold. My bride places them in a plastic garbage bag
for a few days. They come clean with little effort, just using a
water hose.