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You should never block both the top and bottom of your chimney. Proper airflow is essential because the temperature inside the chimney will still fluctuate as your house warms and cools. Moisture can build up without ventilation, leading to dampness in your walls over time. Blocking the top prevents debris and animals from entering, but the chimney still needs air circulation to avoid condensation issues. Allowing the chimney to breathe maintains the health of your home and prevents long-term damage.

There is very limited scientific evidence to support the efficacy of essential oils against bed bugs and they are very unlikely to kill the species. However, a 2021 study published by the National Center for Biotechnology Information (NCBI) found that compounds in essential oils like clove oil, lemongrass, citronella, and bergamot could repel the insects.

Most spiders are harmless and are more interested in finding and eating insects than trying to bite you or your family members. Certain spiders in your home may be advantageous if you have an issue with insects. Most spiders are non-venomous and have small mouths, so even if they did bite you, it wouldn’t be enough to cause any harm.

However, some species of spiders can cause harm if you are a victim of their spider bite, including the black widow and brown recluse varieties. Both species’ venom is poisonous, and you should seek medical help if bitten.

Seeing a rat or two isn’t uncommon, especially in mild climates. That doesn’t mean they are actively a danger to your home. The problem is when you start seeing rats regularly in your yard, there’s a good chance they are also looking for ways to get into your house or other buildings. All they need is a small hole or gap, and they have a new place to nest -- which is bad news for you. Stay cautious if you start seeing rats in your yard all the time.