How to maintain a device

Always check a device before practice.
A device opening must be free of debris, and inserts are freely movable.
A grip butt must be motionless and intact.
Stop practice immediately if any damage is found, as it can lead to injury. Lubricate a device with synthetic oil. Use WD-40 or a similar kind—one tiny push in an opening. Avoid using thick lubricants, such as grease, as they can prevent a bullet from moving freely inside a device. Don’t overfill—it will splatter in your eyes. Lubricate a device every six months or as needed. Avoid device contact with water.