Deep fryers are a great way to cook food quickly and easily, but there are some items that should never be put in them. These include: plastic or foil wrappers; any type of metal such as forks, knives, spoons, etc.; paper products like napkins or cardboard; anything with high sugar content, such as candy bars; and wet ingredients like raw eggs. Additionally, deep frying can cause oil splatter, which is dangerous, so it’s important to keep children away from the appliance while it’s in use. Finally, always ensure you have enough oil for your food item before putting it into the fryer.