SensorScope Cleaning System - Digital SLR Sensor Cleaning KitWhat you can't see can affect your pictures. Countless types of contaminants will turn up in the camera chamber and on the sensor. Dry loose particles may statically adhere, while wet particles can chemically bond to the sensor. Contaminants come from changing lenses, dusty humid environments, and even from inside the camera chamber itself. SensorScope enables you to check your sensor to see if it needs cleaning there's nothing safer than not cleaning