A few ladybugs inside the home are an innocuous presence that usually does not affect your everyday life. Dozens or even hundreds of ladybugs inside of your home, however, are a nuisance, especially when they begin to fall into your hair, bathtub or breakfast cereal. A homemade lemon spray not only kills ladybugs in your home on the spot, the odor also deters any ladybugs from invading your home in the future.
Pour 3 cups water into a plastic spray bottle.
Add 1/4 cup lemon juice and 2 tbsp. liquid dish soap to the bottle.
Replace the bottle's top and shake it vigorously to mix all of the ingredients.
Spray the mixture directly onto any ladybugs inside of your home. Look for ladybugs near heat sources; many ladybugs enter homes to escape cooler temperatures outside.
Vacuum up the deceased ladybugs with a hand vac. Use a shop vac if there are several ladybugs to be removed.
Empty the contents of the vacuum inside an outdoor trash can.