1. Spotting the Drain Flies: This is a very simple way to identify the drain fly infested areas. Here, you have to find out the drain fly adults by naked eye. The adults can be spotted resting on walls and ceilings of the infested areas. And as these flies are not good at flying so their source i.e. (breeding area) is very near to the infested area.
So, when you spot some adult drain flies, find a nearby pipe or a drain. The drain or the pipe will be acting as the breeding source for these flies. In case there are multiple pipes or drains near the infested area then you may need to use the second method to find the actual breeding source.
2. Drain Test: In this test, we are going to cover all the drains outlets and pipes with a sticky tape, so that when drain flies try to come out of the source they get stuck to the tape, giving us infestation poofs.
Follow the below steps to do this:
1. First of all, clean and thoroughly dry the drain areas in your kitchen and bathroom.