1. Put 2 squirts of liquid dishwasher detergent (Cascade type) in the coffee reservoir and carafe then fill with boiling water. Put this mixture in the reservoir AND the carafe. Don't brew it!!! This is just for cleaning. 2.Let it Sit 10 minutes 3. Spill the water/dishwasher detergent out of the reservoir and carafe, then rinse and rinse again with HOT WATER.