One of the areas of the house where it makes the most sense to avoid chemical cleaners is inside the refrigerator, since an airtight fridge can create a chemical cocktail that can spoil your food. To keep your fridge smelling fresh, try this tip: Use an old sponge to absorb odors. When your sponge is ready to be replaced, dampen it, then microwave it for 90 seconds. When it's cool, generously sprinkle baking soda on top of it and place in the back of the fridge. The sponge will absorb odors and help keep the fridge smelling fresh.