Whats this white fatty/grainy residue that keeps ruining the appearance of my con starch fried chicken. Admittedly, I reuse peanut oil thats stored in a container that isn't airtight. It may also be garlic or salt residue; I use garlic salt, but may be using too much, even though it happened with regular salt. Can fat from previous cooking sessions leech into the oil and condense onto food on the next?