We were skeptical about Keurig machines when we first heard ... leaving the valve passes through a rubber grommet in the lid of the water reservoir pointed to by the other arrow.

This hack makes your Keurig ... in the tank and is monitored by a Basic Stamp microcontroller. When the level is low the BS1 drives the solenoid via a transistor, letting the water flow.

If your cup of joe is coming from a Keurig, we asked a few experts about ... every part of your machine from the exterior to the water tank. Clean the brewer's exterior | Clean the water tank ...