Oil stains on nylon, if mechanical, can only be washed with gasoline. If food or animal oil is washed with detergent, it is easy to clean.

Of course, there is also a general method, that is, washing with 84 disinfectant, no matter what oil stains, they can be cleaned. Need to be reminded that 84 disinfectant is corrosive and strong. After washing, wash it with clear water several times to prevent damage to nylon.