Olive Oil
You have probably not given much thought to it, but storing olive oil in the refrigerator is not something that you would like to do unless you want some butter. The cold in the refrigerator will only harden and condense the olive oil. Instead, you should store it in a dark, cool place.
Onions
Like garlic, they only become moldy when you leave onions in the fridge! If there are some unpeeled onions lying around in your house, make sure that you leave them in a dark and dry area, since they have to keep air fresh for a long time. Place it in a container and store it in the refrigerator if you have an onion peeled.