Never run the self-cleaning cycle on your oven while not home or overnight. The heat is very intense in self-cleaning ovens, so keep this in mind when using it around children since the door will get very hot.
Before self-cleaning:
The heat during self-clean is designed to turn the debris, grease and dirt into ash. If you have excessive buildup of food or grease on the bottom of the oven, it will smoke during self-clean. Remove the oven racks and wipe down the oven surface with a damp cloth, paying careful attention to remove any excess oil or grease, especially on the door glass. Oven racks can be cleaned in the sink or can be inserted into the dishwasher.
Self-cleaning process
Once the self-cleaning process is started, the oven will be locked for between 3 and 5 hours, depending on the setting that is chosen. Be advised that the door will remain locked for a period after cleaning to allow the oven cavity to cool.
After self-cleaning is complete:
After the automatic door lock releases, wipe the interior of the oven again with a damp cloth to remove any dust or ash created by self-cleaning. Wiping down the residue is important to maintain proper cooking. Food splatter marks on the door glass may need to be removed with a plastic scraper or similar.