Once the existing water filter in your Keurig is spent, replacing it with a new one will take less than 10 minutes. Start by soaking a new charcoal filter in a cup of water for 5 minutes or so.

If that first delicious cup of coffee from your Keurig is now only a distant memory, dissolved in murky flavors and sluggish speeds, it may be time to descale.

How does the Keurig K-Duo Essentials Coffe ... 10- or 12-ounce cups of coffee from the 60-ounce removable water ... 10 or 12 cups of coffee into the carafe through a traditional drip filter.