Using this knob is easy. First, make sure your equipment has a 0.25 - inch shaft. Then, simply slide the knob onto the potentiometer until it fits snugly. The strong friction fit will keep it in place. When adjusting, hold the knurled part of the knob for better control. As for maintenance, keep it clean with a dry cloth. Avoid using harsh chemicals as they may damage the metal or plastic. If the knob gets loose over time, you can gently press it back onto the shaft to restore the tight fit.