Boil a big saucepan of water and add a half cup of baking soda (but only one tablespoon at a time - it fizzes). Drop the filter in and watch the grease slide off. Rinse. (No need to repeat on other side.)
Clean grout lines using harmless, chemical-free products.. all you’ll need is: 7 cups water, 1/4 cup vinegar, 1/3 cup lemon juice, 1/2 cup baking soda. Mix all four ingredients in a bucket or bowl. Scrub the grout with a small scrub brush or toothbrush, wiping off the excess with a washcloth.