Your home is your safe haven. It’s where you go to relax and unwind after a stressful day, curl up on the couch with a glass of wine, and be with your friends and family. But what if your home is actually making you sick?

Despite taking precautions against obvious dangers like mold and mildew, many of us ignore a variety of items we keep indoors that could be comprising our health. From kitchen appliances to TV remotes, there are a surprising number of things in your home that could be making you sniffle and sneeze.

Here are some of the most common areas around your home where germs like to hide and how you can get rid of them and breathe easier.

Your HVAC system

It’s no secret that autumn is popular. In fact, 29% of Americans prefer autumn over the other three seasons, making it the most popular season in the United States. But autumn is also great for another reason: it’s maintenance time for your HVAC system.

Our HVAC systems do a lot for us throughout the year, keeping us cool during the summer and warm in the winter. But if you’re not taking care of your HVAC properly, you could be compromising your health. If you think 3-6 weeks is a long recovery period from a simple surgery, wait until you have rhinovirus symptoms that last just as long.

It’s recommended to change your HVAC system filters at least once a month or twice a month if you have pets. This is because dirt, debris, and hair build up in your filters, which makes it difficult for your HVAC to run. And the average person sheds between 50 to 100 hairs a day.

When you don’t change your filters, those particles float around in your indoor air and cause stuffy noses, colds, and sinus headaches.

Your home’s old windows

Most homes that were built prior to 1978 in the U.S. contain at least some lead paint. Lead poisoning can cause a lot of issues from behavioral problems to upset stomachs to brain damage. One of the biggest culprits when it comes to lead poisoning is old windows.

According to a study published in the Journal of Occupational and Environmental Hygiene, old windows that rubbed against the walls when they were opened and closed created up to 27% more lead dust than new windows, which opened and closed smoothly.

If your windows are difficult to open or they’re as old as your home, it may be time to replace them. Not only will you reduce your risk of lead poisoning, but you can also reduce your energy bills. Approximately 30% of the average home’s heating energy is lost through its windows.

Your refrigerator compartments

Your appliances may have a powder coating to provide decoration and protection from dirt and debris, but it’s still important to give them regular scrub-downs. This is especially true for your refrigerator.

A study from Microban Europe found that vegetable drawers are a major source of contaminants. These drawers can hold 750 times the number of bacteria that are considered safe.

These bacteria range from listeria to salmonella and E. coli. These bacteria can cause serious digestive issues and even death in some cases. Not even vaccines, which have been saving lives for over 300 years, can stop these bacteria.

Be sure you’re giving your refrigerator compartments a good scrub down at least once a week. Wash your produce before eating it, too, even if you’ve washed it before putting it in the fridge.

It isn’t just door handles and remote controls that harbor bacteria and germs. Even mold only takes about 48 hours to settle in. By regularly cleaning the items around your house listed above, you can reduce your risk of getting sick and breathe a little easier in your home.