of soy sauce that you only use occasionally that expired months ago. it's handy to have a garbage can nearby as you empty the shelves.
if there are areas where juice has spilled or meat packages have leaked, use an equal mixture of vinegar and water to clean those areas. you can also wipe down the walls to remove any loose gunk.
add enough white vinegar to baking soda to create a thick paste. the amount of vinegar needed will depend on the humidity. if you're starting with a cup of baking soda, add 2 tablespoons of vinegar at a time until you have a thick paste.
use a sponge to apply a 