Don't ignore the "de-scale" light on your Keurig Brewer. Most water contains minerals such as calcium. Over time, these minerals can create "scale" buildup inside your Keurig brewer.
When your de-scale light is on, it’s time to clean your brewer. We recommend using Dezcal Cleaner for Keurig Single Serve Coffee Brewers every six months to keep your brewer in top condition. Activated scale remover Thoroughly cleans your Keurig Coffee Brewer.
Descaling Your Keurig Brewer Video from Green Mountain Coffee

Commented by Jessi January 14, 2010