Cleaning the Lens Mount. Remove the lens from your camera body and attach the lens cap to the lens, then set it aside. Apply one to two drops of lens cleaning solution to your microfiber cloth and wipe out the inside of the camera body cap.Removing dirt and dust from the cap will prevent dust from settling in the camera sensor and cleaning this piece first allows it to dry before placing it on the camera body.emove the lens cap from the lens and wipe the inside of the cap with your microfiber cleaning cloth. Apply a small amount of cleaning solution to your microfiber cleaning cloth, just a drop or two, and gently wipe the lens mount and the rubber gasket surrounding the lens mount.