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For a minor infestation, you can expect to clear up a German cockroach problem in about two weeks. That’s usually enough time to confirm that they don’t have additional hiding spots and aren’t continuing to encroach from an outside source. If you have a major infestation and use the services of a pest control company, it can take several weeks and multiple visits to fully clear your home, up to a couple of months.

Finding mouse droppings without seeing any mice is a common sign of an infestation because mice are nocturnal and skilled at hiding from humans. Droppings are often the first and most visible evidence of their presence. The location, quantity, and freshness of the droppings can help you determine where the mice are most active and how severe the infestation might be. Since mice are active at night and often travel through hidden pathways like inside walls, you may not see them directly. It's important to look for other signs of an infestation, such as gnaw marks, scratching sounds, or greasy trails along walls. If you find droppings, consider setting traps or contacting a professional exterminator to address the issue.

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.

Citrus scents such as lemon or lime are lethal to bed bugs. They’re drawn to the smell, but the chemicals often kill them. There are other ways to kill bed bugs without an exterminator, including using steam, DIY heat treatments, essential oils, diatomaceous earth, and more. However, you should hire a professional bed bug exterminator to eliminate large numbers of bed bugs.