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Roach spray usually starts working almost immediately on contact—within seconds to a few minutes. However, if it's a residual spray designed to keep killing over time, it can take hours or even days to fully affect roaches that come into contact with treated surfaces. For larger infestations, it may take at least a week to see a noticeable drop in activity, since not all roaches are exposed at once.

If you’ve experienced bed bugs more than once, the best way to get rid of them permanently is to hire a professional exterminator near you. Exterminators use powerful treatments that target all stages of the bed bug life cycle. In addition, you can seal cracks in floors or walls, wash fabrics in hot water, and vacuum regularly to prevent them from coming back.

Gophers are ubiquitous in certain areas, and the only way to completely get rid of them is to put down gopher wire two feet below the surface of your soil and vertically along the edges of your yard. Unfortunately, this may not be a practical solution unless you’re completely redoing your yard or installing an aboveground garden. Alternatively, you may consider putting underground rock barriers around the edge of your yard to discourage gopher visits. However, you’ll still likely get some pests because they can dig as deep as 6 feet below the surface.

Vinegar can keep some animals at bay, like deer, rabbits, foxes, and raccoons. Keep in mind that your household pets, like cats and dogs, also don’t like the smell of vinegar. You can soak rags in white vinegar and put them up around your garden beds to keep the pesky critters from eating your plants.