How long does it take for grease to build up to 1/4 inch thick, and turn black? I wanted to post this last night when we came home from cleaning, but I really wasn't in a mood fit for talking, lol! The top of the stove, where I was cleaning part of the night last night, we took a great degreaser and a straight razor blade in a handle and scraped and scraped it off. In the curve of the shelf over the stove, it came off in hunks that are a good half inch thick! I saved some of them, if I can get a picture, I will post it later. This particular building has a room for smoking meat for BBQ....it has two sinks and a floor drain.........all three were almost totally stopped up 'cause they poured GREASE down them!!!! I spent a good three hours herding water from where we were flushing them to one of the other drains last night, ugh! Please tell me that this nasty mess isn't the "norm" in a restaraunt, and that the health dept. probably shut them down? Hub said he's going to ask the inspector when she comes back out to inspect it after cleanup if the did shut them down, if not how in the heck they got by with such a mess of crap!