Air conditioners are a GREAT invention and a staple of the hot Summer months. However, a very often potential health hazard is dirty and dusty vents. These can irritate sinuses and lungs. A simple way to rectify this is with a dryer sheet. Rub the vents with a clean sheet periodically because it’s woven fibers collect dust and the anti-static properties will help prevent future dust build up. You can now breathe easier!