My son is in a young person's hostel. He had a fridge in his room about a week ago there were loads of flys in there. He thought it odd. But fully cleaned it all out. Thought it was just a weird one off thing. But it's happend again . He just video called me and it looks like loads. They are not fruit flys . There's no gone of food . He says the fridge is cold.
I told him he needs to tell staff . He says he feels embarrassed.
What could it be . They are small black flys definitely not fruit flys though