Using Distilled Water?
KitchenAid ® does not recommend using distilled water because of issues with the flow rate through the coffee grounds.
- Distilled water causes the coffee grounds to swell and slows the flow of water. This leads to bitter, over-extracted coffee or could lead to the brew basket to overflow. It is even worse with decaffeinated coffee.
- Distilled water also causes the metal brewing element to slowly deteriorate the hot water tube, causing premature failure of the coffee maker.