gas
gasoline
The funniest line is the caustic acid in Oven cleaner. Cautic yes, acid no. without getting intot the pH scale here, an acid based material (solution) is low pH and an alkaline or caustic solution is a high pH matrial or solution. The alkaline stuff works better on animal (polar) grease than petroleum grease. Remember grandma's soap from school, that was made with tallow (fat) and caustic.
Something petroleum based will be best. maybe a plactic spatula to scrape of the major crud and some diesel fuel (that Gunk engine degreaser spray), which is close to kerosene and jet fuel, home heating oil etc. and a stiff plastic bristle brush, then some purple clean. Wear rubber gloves and splash goggles.
Greg
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