K&K Air Duct Cleaning Services – If you do one thing only for so many years, you become good at it. That’s how we became one of the most well-known experts in the DC, MD and VA area over the years” Our success is also based on our well-paid employees who stayed with us all these years. Our goal at K&K Air Duct Cleaning Services and Dryer Vent Cleaning is simple to provide the very finest duct cleaning service our customers will ever have while keeping it affordable, and we back it up with our Satisfaction Guaranteed or the Work is Free.