"Make your own natural ant spray by using the power of essential oils. Good essential oils to repel ants are peppermint, tea tree and lemon, although other essential oils can be used, such as eucalyptus, lavender or cedarwood.
Try mixing 8 oz. of water in a spray bottle with 1/2 teaspoon natural soap, and 12 drops of one of the above essential oils – remember to shake the bottle before each use and repeat every few days until the ants are completely gone."
Chalk
Amazingly, ants will not cross chalk lines! Nobody seems to know why, but it is an excellent way to put an end to ant trails heading for your home. All you need is some ordinary white chalk, so if you don’t mind chalk lines all over the place, go ahead and draw!
Baby powder
Baby powder can also keep ants away and it has the same effect as chalk. Sprinkle some at any entrance points to block the ant trails.