I always have a bottle of silver powder and when I get a new apartment (every year) I pull out the oven, fridge and dishwasher and put that stuff down after vacuuming the area.

One time the situation was so bad I also had to use the diatomaceous earth power in combination.

I stored all my food trash in my refrigerator for months an no food was left out that wasn’t in a sealed plastic container.

Along with having the apartment spray I was able to get it under control.