Kill rats while they sleep by poisoning them with boric acid, which you can usually find in drugstores and hardware stores. ... Leave out for the rats to ingest overnight and in a few days your rat problem will (hopefully) be gone. Just be aware that boric acid is poisonous to all animals, including humans!

Does Borax get rid of rats?

This is one of the simplest ways of keeping your house mouse-free. ... This is an effective way of exterminating mice, but can be risky if you have children or other pets. Apart from the commercially sold 'rat poisons', bait mixed with borax powder can also be used as an easily available rodent poison.

What kills rats instantly?

Traps are one of the most effective ways to get rid of rats fast. For best results, consider using snap traps, which are a fast method to kill rats instantly. To prevent other animals from getting into the traps, place them inside a box or under a milk crate.