This natural ant repellent uses essential oils for ants and it works well. It is simple, inexpensive, and safe for use indoors and out.
Remember to always shake the bottle before use. Essential oils will separate between uses.
I always use a dark colored spray bottle to prevent the oils from oxidizing, but your oils will stay fine if you store your spray bottle in a dark, cool place in between uses.
Do not use this spray on the skin because the oils are very strong and could cause burning or tingling.