Mr. Mixer specializes in the restoration and cleaning of KitchenAid and other brand mixers. For this piece, his client tried to take one apart and clean it themselves but weren't able to, so they brought it to him. He'll take out all the parts, remove all the built-up grease, clean the gears in a degreasing-solution tank, and put it all back together with new grease to help the gears run smoothly.