"Waterlogged: The Hidden Dangers of Leaving Water in Your Coffee Maker Coffee lovers, beware: neglecting to regularly clean and refill your coffee maker's reservoir can have more than just a bitter taste. According to experts, leaving water in your coffee maker for too long can lead to the growth of bacteria, mold, and mineral deposits that can compromise the taste and safety of your daily brew. But just how long is too long? A new warning from scientists reveals the optimal amount of time to store water in your coffee maker, and the surprising reasons behind this recommendation. Read on to discover the shocking truth about the water in your coffee maker and how to keep it fresh and clean."
As science would have it, leaving water in your coffee maker reservoir day after day isn't the best idea. Here's how long liquid should stick around, and why.