Fridge smells a little funky but you don't have any bicarb soda handy? Oats can fill in as a natural alternative.
Oats are great at absorbing oils, but it works just as well for eliminating smells. Just pour some oats in a bowl, and set it in your fridge overnight. By morning, it will have neutralized the offensive odours. And once the oats have done their job, you can even reuse them to clean a cast iron pan. Be sure to click through the source link to find more clever uses for this humble breakfast food.
10 Alternative Uses for Your Old Oatmeal [WonderHowTo]