To treat the drains, you can also use baking soda and vinegar to exterminate ants.

Ants in bathroom drain. Let the solution bubble inside the drain for 10. Follow the baking soda with 1/2 cup of white vinegar. You can also soak a cotton ball in a solution of cinnamon essential oil and water and then wipe down common ant hot spots in the bathroom, such as the sinks and drains, to help repel.

Basically, ants are able to thrive in a bathroom as they get easy access to water, food, and shelter — thanks to the clogged drains, water puddles, and dark corners. You can make an effective ant repellent spray using the following simple method. If you suspect ants are coming from the sink drain, your best bet is to clean them out to eliminate them at the source.

Let the whole thing sit for an hour or more and then follow it up with hot water (not boiling though, as that could potentially damage your sink). There are tiny ants in your bathroom sink because the bathroom environment is very enticing for these ants and a great place to build their colonies. Pour 1/2 cup of baking soda down the drain where ants have been spotted.

For starters, pour about a half cup of baking soda. The main reason you have ants in your bathroom could be a steady supply of food and water. Using vinegar and baking soda paste is a good solution to prevent the ants from coming up the sink or the drain.

Make a mixture of boric acid and sugar. These tiny ants enjoy moist spaces. Use vinegar and baking soda.

Pour mixture into a spray bottle. The combination of baking soda and vinegar is. Mix an equal quantity of white vinegar and water (1:1) to prepare your insecticide spray.