Unplug the oven or switch off power at the breaker
Let the oven cool completely
Remove oven racks, trays, and loose debris
Fill the steamer with water
Heat the steamer until it produces steam
Direct steam onto the oven walls, door, corners, and glass
Hold the steam on dirty areas for several seconds
Wipe loosened grime with a microfiber cloth or sponge
Repeat steaming on stubborn spots
Use a non-abrasive scrub pad for baked-on residue if needed
Clean the oven racks separately with steam and wipe them dry
Wipe all surfaces with a clean damp cloth
Dry the oven thoroughly with a dry cloth
Reinstall racks and trays after everything is dry