It’s unclear if it’s the smell or something else that causes ants to avoid cinnamon, but nevertheless people have had success with this simple method. To repel ants, put cinnamon sticks by doors and windows and on the floor in the corners of your kitchen.
9. Lemon juice
You have two options for using lemon juice against ants. If you know where the ants are entering the house, put some lemon juice into a spray bottle and spray the entry points. If you’re unsure how they’re getting in, place small dishes of lemon juice near entrances to your house. The ants are repelled by both the smell and the acidity of the lemon juice and will avoid coming into contact with it. Make sure there’s no sugar in the juice, though, as that would attract the ants.