Think of your dryer vent like your respiratory system. If your mouth and nose are completely unobstructed, then you breathe comfortably and physical activity is a breeze (assuming you’re in good health). Now, image placing a cloth lightly over your face. Breathing becomes more difficult, making walking, running, or physical activity more of a challenge. Next, image the cloth almost completely obstructing your air flow. Breathing would become labored, and physical activity would be extremely challenging. Your obstructed air flow would eventually result in slower performance and a faster physical breakdown.