Rub,
we rarely use a degreaser - because even if it says it's safe, I never trust the 'govt' to tell us the truth.
But when we do use this Oven cleaner - we wash, rinse, wash, rinse, repeat, repeat, etc.
We use this - and it works well - I get it at Sam's Club by me. and IT WORKS real well on the Ole Hickory Pits we have.
http://proforcecleaners.com/products...-fryer-cleaner