 And if you can't do that, you live in an apartment building and you're not in control, at least buy one of these HEPA filter systems, these four-stage HEPA filter systems. It's worth it. It's such a great investment. Turn that baby on and run it so that you have the cleanest air possible. You'll be better off whether it's air-conditioned or not. Because these poorly maintained air conditioners can lead to all kinds of things, including migraines and headaches and dehydration, poor quality of air. Dry air is another problem with air conditioning.