Summarize the following:
Every time you use your kegerator, you should clean it afterwards. This helps remove all beer residue from the line and faucet. Cleaning after every use helps you avoid messing up other beers. If you don’t clean between kegs, microbial infections may occur in the kegerator that will alter the beer. Before you start cleaning, shut down the kegerator completely. Unplug the kegerator. Make sure you turn off the CO2. Then, you want to close the regulator, disengage the tap, and completely remove the keg. Start by cleaning the outside of the kegerator. Make sure to wipe down the tap, lines, spill tray, regulator, and tank. You also should wipe the inside of the cooling unit. Then, clean the inside surfaces, such as the beer lines, the spigot, and the tap. Use soap without any scent and warm water to wipe down all surfaces. Any spilled beer, puddles, or drops can get in your kegerator and cause problems with future kegs.

Summary:
Clean your kegerator after each keg. Turn off the kegerator. Wipe down the surfaces with mild soap and warm water.