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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.

Brown recluse spiders are found in Midwestern and South Central states like Nebraska, Ohio, Texas, and Georgia. While it’s possible to find spiders from the same genus elsewhere in the country, you’re unlikely to find a brown recluse infestation outside of these designated zones. In any case, there are other dangerous spider species across the U.S., so always use caution when dealing with infestations of any kind.

To determine if you have a rat or mouse infestation, look for several key differences. The most obvious is the size of the rodent: rats are significantly larger with thicker bodies, while mice are much smaller and more slender. You can also identify them by their droppings; rat droppings are larger and rounder, about the size of a raisin, while mouse droppings are smaller, like a grain of rice, and often have pointed ends. Other signs include the sounds they make, as rats produce louder scratching and gnawing noises due to their size. Behaviorally, rats tend to be more cautious, whereas mice are more curious and might be seen more often. Additionally, rat nests are typically larger than those of mice. If you are unable to see the pest or find clear evidence, a professional inspection can provide a definitive identification.

The best way to ward off roaches is to take preventative measures and stay on top of routine extermination services. Keep them away by cleaning your kitchen free from crumbs, properly storing away food, covering your pet’s food bowl, and reducing moisture in your home to make your house less tempting for roaming cockroaches. Remove clutter—especially cardboard boxes that roaches love to hide in, and replace them with plastic tubs.