If you're evacuating because of a hurricane, do the quarter in a cup in the freezer trick. Basically, you fill a cup with water and put it in the freezer. When it's frozen, put a quarter on top. When you get home, check the quarter. If it's still on top, that means you didn't lose power and you don't have to worry about throwing away your food and deep cleaning. If the quarter is at the bottom, that means you lost power for a considerable amount of time and you need to throw away the contents of your fridge. While you're doing that, you can deep clean the fridge following the steps in this post.