The treadmill. Clean the motor cover and exposed areas of deck and check the operation of the stop button every week or two. Once a month, vacuum inside the motor electronic compartment and underneath any treadmill that's on carpet. (Keeping treadmills on rubber mats can help keep carpet fiber away from the machines.) For treadmills with automatic wax lubrication systems, check and clean the wax nozzle each month. Do not use cleaning solution to wipe the belt; this will impair the lubrication system. Every two to three months, check the belt tension and tracking, and inspect the hardware (nuts and bolts), belt and deck for wear every three to six months.