Stop Buying Harsh Oven Cleaners. 
Try this recipe at home.
• Mix 1/4 cup dish soap
• Mix 1/2 cup lemon juice
• Mix 1 cup vinegar
• Mix 1 1/4 cups water
STEPS:
Shake in a spray bottle.
Spray inside your oven and on the door.
Let it sit, then wipe with a damp cloth.
Your oven will look like new. 
