No need to scrub, put the oven rack in a bag: it becomes like new again

No-Scrub Oven Rack Cleaning Method (Using a Bag)
What You’ll Need:
Large sealable plastic bag (like a garbage or zip-top bag, big enough to fit the rack)

1/2 cup ammonia (alternatively: baking soda + vinegar also works, but ammonia is stronger)

Old towel or newspapers (to protect the surface)

Gloves (ammonia fumes are strong — be cautious)

Instructions: