There are certain things which you should definitely avoid if you are using a toaster oven. The top of this is having a metallic utensil in the oven while it is on. If you read toaster oven reviews, you might come across many other precautions which you should take. Most of these would be related to the circuitry. It would be best if you don’t plug in more than one heating appliance to the same circuit. People think that there is nothing wrong with using an extension lead. However, you must always avoid using such a heavy appliance on extension leads. If there is no other alternative then you should try to use the shortest extension lead at your disposal. You also need to make sure that the appliance remains clean as well. For that you should clean it after using it every time. You must wait for the oven to cool down before cleaning it.