Proper Usage. Use a humidity gauge in order to ensure proper humidity levels in your home. According to the Mayo Clinic, the ideal humidity in your home should measure at least 30 percent but no more than 50 percent.If the humidity level drops below 30 percent, you may experience problems like dry throat, eyes and skin.Asthmatics may become wheezy due to airway congestion. If the humidity rises above 50 percent, bacteria and mold can grow in your home.f the humidity level drops below 30 percent, you may experience problems like dry throat, eyes and skin. Asthmatics may become wheezy due to airway congestion. If the humidity rises above 50 percent, bacteria and mold can grow in your home.