Disinfect air-conditioner and humidifier filters

An air-conditioner or humidifier filter can quickly become inundated with dust, soot, pet dander, and even potentially harmful bacteria. Every 10 days or so, clean your filter in equal parts white vinegar and warm water. Let the filter soak in the solution for an hour, then simply squeeze it dry before using. If your filters are particularly dirty, let them soak overnight.