A one-way travel control device is the easiest way to remove bats from an attic, as it lets bats fly out of the attic but does not allow them in. Due to health and legal issues surrounding bats, it's important to hire a professional to remove them from the attic.
A professional bat remover starts by completely sealing up any access points into the attic before installing a one-way travel device. The bats naturally pass through this device to escape the attic and then cannot get back in. Once the bats are gone, an extensive cleanup process must take place. Bat guano can be toxic if not handled properly, and the cleanup of the guano is an important part of getting rid of bats from an attic.