proposal :

1. clear off all the contents of the fridge.

2. clean it up properly.

3. leave it empty for a few days, clean up the flies every day.

4. start using back after you find no more dead flies inside it.

5. if the dead flies start to show up again..
buy new fridge.

unplug electricity may make your fridge smell later.. so, don't turn it off.
just clean up a bit but leave it turned on.

leave items properly covered inside (water bottles, meat/fish put in closed containers, etc.)

try not to stock up bio items e.g. fruits, veggie, etc. since these are the main attraction for the flies.

and as one person mentioned up top - even raisins attract flies in his fridge.

This post has been edited by pokchik: Feb 28 2019, 10:55 AM