Using this spring clip is easy. First, locate the shaft hole on your stove knob. The clip goes inside the shaft hole, on the side opposite the flat part. Gently place the clip in position. Make sure it fits snugly so the knob works properly. As for maintenance, try to keep the clip clean. Wipe it with a dry cloth if it gets dirty. If you notice the knob becoming loose again, check the clip's tension. Over time, springs can lose their elasticity. If the clip loses its tension or breaks, it's time to replace it. Remember, this clip doesn't fit every type of knob on Westinghouse, Simpson, and Chef stoves, so double - check before use. Also, it might work with some other brands, but always test for a proper fit.