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The most effective natural roach repellent is Borax with its key ingredient of boric acid and diatomaceous earth. But some homeowners may not feel like these are “natural” enough, especially since you can’t use Borax around curious pets or toddlers.

On the other hand, studies have shown that oregano oil mixtures have some of the best repellent effects, and other research indicates that catnip oil, peppermint oil, and citrus oils have notable effects on keeping roaches away. Rosemary oil has been shown to be the most effective natural oil for killing cockroaches outright.

A solution of one part bleach to 10 parts water or a disinfecting product that contains phenol (such as Lysol) is known to kill hantavirus and other pathogens found in mouse urine and feces. Simply spray this solution over and around the locations you expect mice to be living and running through, and the homemade disinfectant will do its job to rid your home of any feces and urine particles you could be exposed to.

Rats are nocturnal creatures, meaning they are most active at night, typically from late evening through the early morning. They use the cover of darkness to explore, forage for food, and find water, as they feel safer and can avoid daytime predators and human activity. Their sharp senses, including keen night vision and hearing, are well-suited for navigating in the dark. Because they prefer to stay hidden during the day in secluded areas like walls or attics, you are more likely to spot signs of their presence—such as droppings or gnaw marks—before you see an actual rat.

You should never use toxic baits or poisons, such as rodenticides designed for mice and rats, to kill or trap possums. Using these toxicants is illegal in many areas and can lead to fines or other penalties. Furthermore, these poisons can cause unnecessary suffering for the animal and pose a significant risk of accidental poisoning to pets or other neighborhood wildlife. Instead of using poisons, it is best to stick with humane methods like live trapping.