Mold in coffee makers is a common problem, but you can prevent it. First, wet and dirty coffee machines are the source of mold, so gently scrub and clean them frequently. Second, descale your coffee pot regularly using vinegar or lemon juice. Finally, wash all machine parts thoroughly with hot water and mild dishwashing liquid at least once a week. By following these simple steps, you can keep your coffee maker free from harmful mold and bacteria and enjoy a delicious cup of coffee every morning.