How do I set the oven to self-clean, and how long does it take?

Remove the broiler pan and other cookware, wipe up heavy soil, clean the oven front frame and door gasket with a damp cloth, then turn both the Oven Selector and Oven Control knobs to CLEAN and slide the latch handle to the right. For moderate soil, the recommended cleaning time is 2 hours; for heavy soil, 3 hours. After cleaning is complete, the oven door stays locked for about 30 minutes until the oven cools and the Oven Locked light goes off. (Page 23)