And social insects usually don't build new nests until the spring, so they probably won't sting anyone in the house where they move in. The easiest way to remove any wasps, hornets or yellow jackets you find is with a vacuum cleaner. Pyrethroid-based sprays will knock down and kill flying insects quickly. But most insects you'll find in the house are moving pretty slowly. But Sparks said not to kill all the insects that move in for the winter.
Ladybugs move indoors, too, to stay warm.
Ladybugs eat many damaging insects both in gardens and on farms. They're on the gardeners' and farmers' side in the constant insect war. Just sweep them up and release them outdoors. If you don't want to run an insect hotel, she said, it's easy to keep them from checking in. If the insects are already inside, they'll move out again in the spring.