Prevention is key:
Seal cracks and gaps around doors, windows, siding, pipes, and vents with caulk.
Repair damaged screens.
Use weatherstripping around doors and windows.
Removing them from your home:
Vacuum them up with a HEPA filter vacuum cleaner. Dispose of the bag outdoors after use.
Gently sweep or brush them into a container and release them outside.
Set traps designed for ladybugs, following the instructions carefully.
Things to avoid:
Insecticides: These are harmful to the environment and may not be effective on ladybugs.
Squishing or swatting them: This will release a foul odor and stain surfaces.
Remember, ladybugs are helpful predators in the garden. If you can tolerate a small number indoors, they may actually help control other pest insects.