I want to clean the gas oven cast iron grates. What are some options I could use?

Wire wool and elbow grease.

I lay the grates on newspaper and use non fume oven cleaner on both sides and the use a steel bristle brush from Home Depot to scrub them after a few hours, and finish it up with SOS steel wool pads and hot water.

A spray on degreaser works pretty good too.

http://www.homedepot.com/catalog/pro...c8e56d_145.jpg

http://www.homedepot.com/catalog/pro...compressed.jpg

Any of the above, but I soak everything in soapy water for an hour or three first. It helps.

This method works for us:

http://cleaning.lovetoknow.com/Clean...l_with_Vinegar