5. Vinegar and Water Spray
The experts at Bulwark Exterminating also recommend using vinegar as one of their top ant-killing household products. Add one part vinegar to one part water in a spray bottle. Spray the cracks and other entry points where you think the ants are getting through. This spray can be used directly on the ants to kill them, too. The downside of this method is it only kills worker ants, but this spray does help mask the scent of their pheromone trails.
If you don’t want the smell of vinegar to linger in your home, use lemon juice with water instead.
4. Citrus Peel Ant Trap
Speaking of lemons, citrus peels also make for a great-smelling non-toxic natural DIY ant trap. Add citrus peel from whatever citrus fruits you have on hand into a food processor with enough water to puree them. Lemons, oranges and grapefruit peels work well. This mixture can be poured over ant nests outdoors and can be placed in a small dish for a trap inside your home.
Why does citrus work as an ant trap? The naturally occurring d-limonene oil found in citrus peels is toxic for ants.
3. Soapy Water Spray
Did you know that ants breathe through their joints? According to Bulwark Exterminating, coating an ant’s body with soapy water clogs those joints and suffocates them. To make this soapy DIY ant-killing spray, add one part non-toxic dish soap with one part water in a spray bottle. Spray entry points with the dish soap mixture, as well as on the ants themselves. The soap will also keep other worker ants from finding the pheromone tracks their deceased colleagues left behind.