How to clean a kitchen faucet Your kitchen faucet is what you most likely use to clean your dishes, fill cups with drinking water and use for water when cooking or cleaning. How many times have you thought to look at the underside of your kitchen faucet though? Is it a spot that you remember to clean often? If not, it definitely should be. Kitchen faucets are a breeding ground for mold, mildew and lime buildup, and should be cleaned at least once every couple of weeks. I’m going to show you a super easy way to clean a kitchen faucet so you can feel good about the water you are using on a daily basis.