Never use a wire brush to clean the grates on your grill top. I believe it is important enough to pass it on here. We had my son and his family over a few years ago for some Pork Chops on the grill. I had brushed the grill with one of those wire brushes and then followed it up with an oiled cloth to get it clean. A tiny piece of wire from the brush had broken off when i was cleaning and lodged in the grate of the grill.
When I put the pork chops on the grill, the tiny piece of wire then became dislodged and went into a Pork Chop. My son Darrel ate the chop and that tiny piece of wire became lodged in his throat. It was a very scary issue for him and the family that night. It did require a trip to the ER where they took an X-ray and then removed it. Bottom line….. do not use those cheap wire brushes.