Using this Chef cooktop control knob is easy. Just fit it onto the shaft of your cooktop. Make sure the pointer aligns with the flat side of the shaft as described. When using, turn the knob gently to adjust the heat settings. As for maintenance, wipe it with a soft, damp cloth regularly to keep it clean. Avoid using harsh chemicals as they might damage the knob. If you're not sure if this part fits your cooktop, always check with us first before making a purchase. This way, you can be sure you're getting the right part for your appliance.