Get Rid of Bats by Spraying Them With Water
If you are trying to get rid of bats from the attic of the house in which you or others are living, you certainly may not want to spray water inside your building. However, if you are trying to get rid of bats from a storage shed or garage or barn, perhaps with a concrete or dirt floor, you might want to try spraying the bats with water, during the daytime, when they are roosting.
Be sure and first create an open space for the bats to use to escape from the building. For example, be sure and open doors or windows so that the disrupted bats can fly OUT of your building. But even if the bats do fly out of your building, they may very likely fly back into your building later. Bats are very habitual and territorial, and will reliably return back to their same roosting places night after night.
As such, if you do not want your bats to return to your building, or other bats to take up residence in your building, you must very carefully and completely find and seal up ALL cracks, holes, open spaces, deteriorated wood, etc, so that bats will not be able to get back into your building.