In cystic fibrosis households, dust is a major threat. It has the potential to infect your respiratory system and trigger a chronic lung infection. In order to prevent dust from building up on surfaces, vacuuming at least twice a week is recommended. However, if you live in particularly dusty region, it may be necessary to vacuum, sweep, and dust more often. Fans and air ducts should not be forgotten, as they tend to harbor dust quickly. From time to time, it may even be a good idea to have your air ducts cleaned out by a professional cleaning service.