Cluster flies, also known as attic flies, are usually outdoor flies but they are sensitive to the cold weather. Therefore, these cluster flies seek shelter in houses the moment the weather starts to get cold. These household pests are slightly larger than common houseflies and less dangerous. As they are considerably less dangerous Cluster flies do not bite humans neither they carry germs or diseases. The only reason why you would like to get rid of the cluster flies is that they travel in the shape of pack, consisting of hundred to thousand flies. Their hoards in the afternoon can be annoying than anything.
First, locate the exact area of your house where the irritating gang of cluster flies is hiding. You can find them in between the walls, empty rooms, attics, basements, ceilings, or garages of your house.
Now, cover you face wit a mask or a piece of cloth. Wear glasses to protect your eye, which are very sensitive to insecticides.
Seal off all the small gaps
Your duty is yet not over, as you have to make proper arrangements to avoid the cluster flies in future. Seal off all the small gaps in the different sections of your home.