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There are quite a few opinions regarding using coffee grinds to keep deer out of your garden, with many people convinced of this method. It makes sense that it could work considering deer have a strong sense of smell and likely do not like the smell of coffee grounds. However, there’s no hard evidence supporting the notion that coffee grounds keep deer away, but it may be worth trying.

It is highly unlikely that fleas will go away on their own without treatment. Female fleas can lay dozens of eggs per day—up to 50—causing their numbers to multiply quickly and spread throughout your home. An adult flea can live for around 100 days or even up to a year as long as it has access to a host, such as a pet or human. Even without a host to feed on, fleas can survive for weeks. Because of their rapid reproduction and resilience, it's best to tackle a flea problem as soon as possible. Hiring an exterminator is recommended to prevent the infestation from worsening.

One way to keep pests away is with good housekeeping. Keep ants away with a clean kitchen. They’re less likely to wander in looking to score some free food if there isn’t a mess to find. Wipe down counters, don’t leave dirty dishes around, and keep food in air-tight containers. 

Home and yard maintenance can also keep pests away. Seal windows, patch any holes or cracks, and put screens on the vents to prevent bugs, rodents, and other uninvited guests from coming in.

While they can be effective at getting rid of bed bugs, there are risks of using bed bug pesticides if they’re not applied properly. The EPA only approves products that meet safety standards, but misuse, such as applying spray to skin, using outdoor products indoors, or overusing products, can pose serious health risks. Always read and follow label instructions carefully. For the safest and most effective results, it’s best to hire a licensed pest control professional.