Repeated use of cooking oil will lead to oil bodies black become turbid, consumers can observe the status of the oil bodies carefully before eating, through its thorough extent determine the oil quality of the pros and cons of the basic colors. You can also spoon it into the bottom of the pot a minor stir, look no muddy body or unknown precipitate emerged. If so, then the oil repeated use of the suspects.
Himself a taste of the fish is essential for test methods. Desirable small piece of fish consumers taste the taste of the process will not be the kind of Hot & Spicy confused, in addition, slight odor outside of the Hot & Spicy, such as slightly bitter, slightly astringent, edible oil, the normal use in the above problem does not appear.