After putting the oven rack in a bag, it seems brand new, so there’s no need to scrub.

Three to four teaspoons of baking soda should be added to the mixture. Consequently, we shall design an extremely effective formula that will eradicate even the most resistant fat. The bag has to be filled with the liquid. Be careful it is not very thick or the bag might be punctured.

To prevent any unintentional spillage of liquid, seal the bag securely at this stage. Then, unfold the bag and set it on a level surface with the rack inside. For around two hours, the oven rack should be allowed to rest in the bag. Allow it to rest for longer, like overnight, if it’s very filthy.
Take the oven rack out of the bag and give it a quick washing under running water once the allotted time has elapsed. You won’t have to scrape it. After cleaning, everything will be completely usable again.