How to fry foods at home perfectly every time – CNET

​Start fresh

Some say you can use frying oil over and over again, but for the best results start fresh. Old oil can transfer flavors from the last thing you fried to your new batch — no one wants doughnuts that taste like popcorn shrimp. 

Oil can also become rancid over time, which affects how well it fries and makes your foods taste bad. 

So, after the grease cools, toss it and clean out your fryer. Many towns have recycling areas where you can drop off your used cooking grease. Whatever you do, don’t pour oil down the drain. It will clog your pipes as it cools and solidifies.