Cover your refrigerator shelf with Saran's Press and Seal Wrap....then when it gets dirty you just peel it off and apply a new piece!
If you happen to be incredibly clumsy and spill food or drinks inside your refrigerator all the time, Reddit user Thinkadinky suggests you line the shelves with plastic wrap for simple, one-step cleaning.
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Easy Clean Fridge - Use Press and Seal Plastic Wrap
A lazy susan for refrigerator leftovers!!! Heck ya! We always tend to forget about the stuff in the back of the fridge! Love this idea!