Methods of Safe Ant Repellent
Let's start with something sweet, shall we? When you're making your gingerbread cookies for Christmas and you decide to sprinkle cinnamon on as the final touch of your gourmet cookie masterpiece, take a trip to your local ant infestation and sprinkle some cinnamon where ants congregate. This spice not only sweetens your cookies, but ironically, has an opposite effect on ants.
If you don't want cinnamon powder getting all over the place, place them in small cheesecloth bags.
Some repellents make great barriers for ants. Spray vinegar around the foundation of the house or areas where they tend to convene. Concoct a lemon juice mixture of a 50/50 ratio of water-to-lemon and spray in the same fashion. You can also just use pure concentrate lemon juice and sprinkle it around the house.
You can also create additional outside barriers from ants. After your done with your coffee, before disposing of your coffee grounds, sprinkle some around your plants or areas where infestations are likely to occur; this keeps them away. Chalk, which is beneficial as an additional barrier, can keep ants away as well and has the benefit of being able to adhere vertically to walls in case ants follow such a route.
Another interesting result is just pouring boiling hot water on their scent trail, which will make them unable to find their way back to the food source.
An indirect way of deterring ants would be to have a nightlight running in the area where the ants are foraging. This has been known to disrupt their pattern of behavior.