Mix equal parts of apple cider vinegar and witch hazel in a spray bottle. Add a few drops of lemon juice and spray around the corners of doors and windows to repel bugs.
Spray lemon juice directly into the cracks in and around your foundation or into any areas that ants are entering.
Make a paste from lemon juice and crushed bay leaves. Apply to your door jambs and window sills. You can also spray any ants you find with lemon juice, when they return to their colony, they will leave a trail that other ants will avoid.