How can I fix this refrigerator problem?

There is supposed to be a defrost thermostat to prevent that.

I am guessing it’s the same problem we had (a GE side-by-side): the self-defrost cycle on the freezer causes a small amount of condensation. Usually it drips down to a spot in the bottom, where there’s a small hole (about the size of my pinky fingertip), where the water drips below and then evaporates.

After a while, though, THAT gets clogged.

The fridge instructions actually described what to do to fix / prevent this: once you get the layer of ice chipped out of the way, take a cup of hot water with some baking soda (I think, maybe it was just salt) and drizzle it into the hole. At first it’ll overflow, but after a couple of attempts it’ll melt whatever ice has clogged the hole. Problem fixed for another year or so,.