Inside our fridge there's droplets of water all over the back wall, so anything at the back of the shelves gets wet. I googled it, and the general advice was to clean out the condensation hole using a cotton-bud. I've done this & it made no difference. Anyone got any other ideas of how to stop it?
the back wall will from time to time be covered in frost, then it will melt into water droplets, then it will run down into the gutter and be passed through the drainage pipe into the evaporation dish on top of the motor.
If you think there is something wrong, you can unplug it, pull it away from the wall, inspect the dish to verify that water is draining into it, and clean out the fluff, grime and mould that you will find. Be careful not to let water splash onto any electrical part.
fridge shelves usually have a ledge at the back to prevent things being pushed against the back wall. If you interfere with the drainage, there will be more moisture in the fridge, so more frost.