i'm going to guess that the fridge has a blocked condenser unit in the freezer, and that water is building up under the freezer and falling into the fridge.

it started acting up when we had that humid snap last week, and has mostly cleared up, for now.

i have it blocked with some paper towel, but that's not going to work - i need to get it fixed, and i don't want to open the fridge (which i do not own.) up myself.