Using the Boxcar Stem is easy. First, make sure your bike's handlebar has a 31.8mm diameter to fit the stem properly. Loosen the screws on the stem using a T25 screwdriver. Slide the stem onto the handlebar and align it according to your riding preference. Then, tighten the screws firmly. When it comes to maintenance, regularly check the tightness of the screws to prevent any loosening during rides. Keep the stem clean by wiping it with a damp cloth. Avoid using harsh chemicals as they might damage the aluminum material. If you notice any signs of wear or damage, it's best to replace the stem for safety reasons.