What teacher hasn’t recoiled at least once at finding something disgusting on a classroom or library keyboard. The truth is that keyboards can be germ factories and can grow unspeakable things as fast as a Petri dish. Advanced Input System’s Medigenic Medical Keyboard is not only easy to clean but will remind you with flashing lights and an annoying sound when it needs a cleaning with sanitary wipes. Cleaning the keyboard turns off the alarms. The 104-key keyboard uses a USB connection, comes with a 30-day return policy and sells for $115.