Cayenne pepper helps keep flies out of your home. Mix cayenne pepper with water, then spray the mixture throughout your home to prevent flies from entering.
Combine onion powder, cayenne, and garlic, then sprinkle the mix wherever cockroaches invade. They detest the smell and will stay far away from these spices.
Fill a spray bottle with warm water, vinegar, and lemon juice. Shake it up and spray countertops, corners, floors, and other areas where ants have been.