There are a few things you can do to clean a coffee maker with bleach. First, make sure the coffee maker is empty and unplugged. Next, pour a small amount of bleach into the water reservoir. Turn on the coffee maker and wait until it starts to run. Then, pour the water into the coffee maker and turn it on. Wait until the water comes to a boil before adding the bleach. Pour the bleach into each cup and stir well. Let the mixture sit for two minutes before using.