How do you properly reset the defrost timer on a refrigerator to ensure optimal performance and prevent frost build-up?

To properly reset the defrost timer on a refrigerator for optimal performance and to prevent frost build-up: 1. Locate the defrost timer - it is usually found inside the refrigerator or on the back near the compressor. 2. Once you have located the defrost timer, turn the dial clockwise until it clicks into the defrost cycle. 3. Wait for the defrost cycle to complete (usually about 30 minutes) before turning the dial back to its original position. 4. Make sure the refrigerator is plugged in and turned on to allow the defrost timer to properly regulate the defrost cycle. By following these steps, you can ensure that the defrost timer is correctly reset, which will help maintain optimal performance of your refrigerator and prevent frost build-up.