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While you might want to cut corners by either borrowing or purchasing used live traps for catching rats, this can be dangerous because those traps could contain leftover viruses and bacteria that will enter your home. Always start fresh with new materials to avoid contamination.

Squirrels hate not having access to secure shelter or food sources. Your best line of defense is to make your property less attractive by removing access to these things. There are chemical squirrel repellents, but these have mixed success. According to Pennsylvania State University, you can apply products containing the bittering agent denatonium saccharide to a squirrel's favorite fence, tree, or roof spots. However, you need to reapply repellents regularly, which aren’t scientifically proven effective.

Some animals, such as bats or birds, will be able to get out of chimneys on their own since they can fly. Other animals, however, may have a harder time and will require the help of a professional to escape. Squirrels and raccoons in particular may become stuck inside a chimney, especially if you have a buildup of soot or creosote inside. This can prevent them from being able to climb out, in which case you’ll need to call an animal control expert to help remove them.

Besides reptile sightings, look for droppings resembling small pellets. Shed skin left behind during growth is another clue. Unusual chirping or rustling sounds could also suggest an infestation. If unsure, consulting a professional can provide accurate identification and effective solutions for managing the situation. If proper pest prevention measures aren't taken, a lizard can live up to five years. And that's a long time to have an undesirable roommate.