Using your new white timer knob for the Vulcan Dishlex 100S or 250SD dishwasher is a breeze. First, make sure your dishwasher is turned off and unplugged. Then, remove the old timer knob by gently pulling it straight off. Take your new timer knob and align it with the shaft where the old one was. Push it firmly until it's securely in place. When using the dishwasher, just turn the knob to select the desired wash cycle. As for maintenance, keep the knob clean by wiping it with a damp cloth from time to time. Avoid using harsh chemicals as they might damage the finish. If you notice any issues with the knob, like it becoming loose or not turning smoothly, don't hesitate to contact us. Remember, this product comes with a full guarantee, so you can use it worry - free.