My mom has an issue with wasps repeatedly building nests under an eave in her patio. She hoses the nest down but is too afraid to get up close to kill them afterwards, and by the next day they've started building another nest. She wants to stop them from building nests on the house, but doesn't want to kill them if she doesn't have to. Ehow says that spraying the area with hot pepper is supposed to repel them, but she doesn't know when she can do this is they're always in the vicinity and repeatedly building nests. Any advice?