Ensure your barbecue has cooled. Spray on the Weber Q and Grate Cleaner and leave sit for 30 seconds. Brush off the grate with a stainless steel bristle brush and then wipe clean with a wet sponge.Click to see full answer. Regarding this, how do you clean ceramic grill grates?When cleaning porcelain grill grates, don’t use metal or wire brushes. Use a soft bristle or a nylon grill brush. Burn off any food leftover on the grates. Then let the grates cool and scrub them with the nylon cleaning brush.Also, how do you care for cast iron grill grates? First Time Use In order to remove any dust, rinse your grates with warm water. Don’t use soap. Using paper towel or a natural bristle paint brush, coat the cast iron with your choice of cooking oil. Place your grill grate on your unlit grill. Put out the coals, and let the cast iron cool. Furthermore, can you put Weber grill grates in the dishwasher? Most Weber products are dishwasher safe, however, we do not recommend throwing it in there right away! Items such as your cooking grates, Flavorizer® bars and Gourment BBQ System inserts should never be washed in the dishwasher as the hot steam could cause damage and ruin these items.How do I get rust off my grill grates?Brush your grill grates with a soft brush to remove as much rust as you can. Put your grate on your barbecue and sprinkle it generously with baking soda. Turn your barbecue on and watch the baking soda begin to bubble and remove the rust. Turn off the grill and let it cool down.