Cleaning your fridge can help fight bacteria that could ultimately cause food to spoil quicker, and hydrogen peroxide is perfect for ensuring that bacteria is kept at a minimum.
First, fill your sink with ice and bury your food in it. Then, transfer the amount of hydrogen peroxide you need into a spray bottle, and have a sponge or microfiber cloth ready.
To make the process quicker and easier, remove parts like shelves and drawers, then begin spraying the entire interior. Next, let it sit for a good 10 minutes with the door closed.
In the meantime, you can spray the removed shelves and drawers. Lastly, wipe the interior with a rag or sponge, and do the same for the other pieces that were removed.