Ideal if you dont know the cause of the stain on your sensor the visible dust dual power kit includes 115ml of vdust plus liquid 115ml of sensor clean liquid and a 5 pack of 13x green vswabs the multi ingredient alcoholic vdust plus liquid is suitable for removing oil and evaporates fast after use whereas the sensor clean liquid is best used on water based stains and light dust contamination thanks to the multi fabric construction and soft texture of the swabs your application will