The Stain Detector Light is the kind of detective that you wouldn't mind hovering around your house. Based on the principles of ultra-violet light, this device helps in finding and removing old and new stains that would have otherwise gone unnoticed by the naked eye. Using it is fairly simple - just switch off all the lights in the room and the UV light will instantly reveal all those undesirable after-effects of the new year party or your pet's small toilet accidents.

The device comes with a flashlight function and a useful stain removal guide. It uses a set of 4 AA batteries and at $6.99, is pretty light on your wallet as well.

Via Gizmodiva.