Start by filling up your large soup pot with water, Fill it halfway.
when the water comes to a boil, add about 1 cup of baking soda. Stir the baking soda and water mixture for a few seconds, turn the heat off, and grab a pair of Kitchen Scissor Tongs and place the oven vents into the mixture.
Leave it for about a minute until you start to see all the grime disappearing!
just let them sit in the mixture because the water will create a foamy film and begin to rise to the top. You don’t want it to boil over so be careful.
Be sure to use your tongs to remove the vents and rinse them with cool water for a minute