Carpet cleaning is something that simply must be administered at some point in time, as dirt and stains will undoubtedly accumulate over time regardless of how many times you vacuum. A minimal amount of dirt and bacteria in your carpets and upholstery can be tolerated, however, when the situation gets to a point where the dirt and bacteria are no longer in your carpets and upholstery, but rather spreading throughout your air, you should have a quick professional clean. If not, you might face some health hazards, namely an increase in asthma and allergy symptoms.