Using this burner control knob is easy. Just align the shaft of the knob with the corresponding opening on your Westinghouse or Chef cooktop and gently push it in until it fits snugly. When using, turn the knob slowly to adjust the burner's heat. Remember, if you're not sure this part fits your cooktop model, contact us first to avoid any issues. To maintain this knob, simply wipe it with a soft, damp cloth from time to time to keep it clean. Don't use abrasive cleaners as they may damage the white finish. If you notice any signs of wear or damage over time, get in touch with us, and we'll help you out.