The only parts of the power meter that can be serviced by the owner are the battery, battery cover(s) and o-ring. No other items are serviceable and no attempt should be made to adjust or alter any other items.
When cleaning the power meter, use only a water-dampened cloth to wipe off dirt and debris. Never use any harsh cleaning chemicals as they could damage the plastic housing. Inspect the battery compartment to ensure the battery contact is clean of any corrosion.
Never directly spray the power meter or battery door with high-pressure water.