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It can be difficult to know what type of animal is in your attic until you see it. But several clues can help you narrow down the suspects:

• Sounds: Smaller animals like rats and mice make scurrying and tapping/gnawing sounds. Larger animals like raccoons and opossums make louder clambering noises. Also, note when animals are noisy: Squirrels are active during the day, while rats are busiest at night.

• Droppings: Rats and mice leave small, rice-shaped droppings (the rat’s version is significantly larger). Bigger droppings belong to larger critters like raccoons. As long as you’re not squeamish, an image search can help you identify what you’re seeing in your attic.

When in doubt, take photos of damage or other evidence and show them to an experienced pest control pro.

Although raccoons aren’t particularly picky regarding food, certain sounds, metals, and smells bother them. You can place these items around your home to keep raccoons away:

• Place wire mesh screens around and underneath decks and porches to prevent raccoons from nesting. 

• Put metal sheeting around the edges of your roof or at the base of trees to deter raccoons from coming close. 

• Place a loud battery-operated radio near the raccoon’s den to keep them from nesting.

• Keep a bowl of cider vinegar on your deck or porch.

• Remove old raccoon scents by thoroughly cleaning and disinfecting underneath porches and decks.

While bleach is an effective roach killer, we don’t recommend using bleach as a drain cleaner. Bleach can release toxic fumes from your drains. Applying this chemical could cause damage to the entire drain system over time. It's better to use homemade drain cleaners or cleaners that don't contain bleach.

Yes, crawl spaces can attract bugs, especially since moisture tends to build up in the space, and moisture attracts pests. A good way to prevent pest infestation in your crawl space is to install a vapor barrier—called crawl space encapsulation—on the interior to seal the space, along with a French drain or some other kind of foundation drainage system outside to keep runoff out of your crawl space. You can also seal foundation cracks and repair damages to cut off access to pests.