I clean my Keurig regularly and never taste a moldy taste. Let's face it, if we are this worried about a cup of coffee a day from a Keurig, then we just need to stay at home.
Everywhere we eat or drink there is bacteria; the soft drink machines at the fast food restaurants that everyone uses, coffee machines at the office or restaurant, even the people who prepare your food.
Even the water at your house. How old are the pipes? Could there be mold, rust or bacteria in them? How do you clean them? Even a water filter doesn't filter everything bad out.
I'm tired from thinking about all this. I think I'll have another cup of coffee from my Keurig. 4951