i discovered you could remove the bottom drawers/shelves from the fridge as well. so i did. and guess what? about half off the rotted watermelon had liquefied into some black tar-like substance, slid its way down the back of the fridge, and pooled on the bottom.
i had to use a metal scraper to get the gooey yet quite stiff substance off the bottom, then go over the areas with lysol and wads of paper towel multiple times
it's still not 100% clean but i'm so done