When people cook at home, they tend to use oil once and then throw it away. There is nothing altogether wrong with that, but there is a pretty good chance that you are wasting oil if you do so. After all, oil is perfectly reusable, and restaurants take advantage of this fact to save money. Reusing oil is not unhealthy at all since the oil in question is still applicable for that type of purpose, but that of course does not indicate that restaurants can use the same batch of oil hundreds of times.
This is because of the fact that the oil will burn after eight to ten uses, so after you have used it at most a dozen times you might want to think about changing the oil. If you rely on a commercial electric or gas deep fryer, oil changes are important for you to do, and the truth of the situation is that failing to do so could cause some health code violations down the line. The easiest way to change the oil is to drain it right back into the container that you first bought it in so that you can throw it away.
Don’t put a fresh batch of oil in immediately, though. You need to scrape off the material that is at the bottom of your fryer since the fact of the matter is that this will start to burn once again and ruin your fresh oil. You need to be really thorough while doing this otherwise the taste of your food could end up being ruined and your customers will stop coming to your eatery because of that very reason.