Other than baking soda, what else can I use to get rid of fridge and freezer odors?

I am renting, and the fridge isn’t a youngin’. There is no way that I can purchase or replace what I have, so, I’ll have to make do.

Both the fridge and the freezer smell a bit off (now, it’s not terrible, but, it is noticeable) and what happens is that my food tastes funny. I have a sensitive nose and wonderfully functioning taste buds, so, I get it all.

Even my g/f feels as though it has a weird taste.

So, what can I do? I already have baking soda in there.