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Some believe that essential oils, like peppermint, may work the way that roach-repellent foods do: the roaches do not like the smell that the oil is producing and so they stay away. While essential oils can deter roaches from surfaces, they do not fight an infestation. Use essential oils as a prevention method, not a removal method.

Bed bugs bite your body to feed on blood. When they bite, they inject an anticoagulant, which is why you may see blood stains on your sheets if you have an infestation. The bed bugs tend to bite in clusters, so the bite marks will look like itchy, red spots in zigzagging lines of three to five bites per cluster on your skin.

The bites are itchy, but for most people, they do not cause serious or long-term health complications. Itching the wound excessively could lead to an infection, and some people are allergic to bed bugs.

You can use a homemade spray to kill fleas on a mattress. To make the spray, combine equal parts water and distilled white vinegar. Spray the mixture on the fleas and all over the mattress. Follow this up with a generous sprinkle of salt all over the mattress, and let it sit overnight. Finally, vacuum the mattress to clean up the salt, dead fleas, and flea offspring.

Set live traps or install a one-way door to evict squirrels, rodents, and other animals from your attic. Once they’re out, seal any entry points to prevent the animals from returning. If you’re dealing with an infestation, call a pro.