Zach Dinicola operates Mr. Mixer, a five-person KitchenAid mixer repair business, out of Augusta. Here he stands in the entrance to his repair shop. The mixers behind him are all used and repaired.

Drop a dime (or any small coin) into your clean stand mixer, positioning it towards the bottom edge of the bowl, and lower the head with the paddle attachment. Turn the stand mixer on a slow speed and ...