A good friend of mine was recently hired as an independent contractor to help a local Air Duct Cleaning Clearfield company increase their customer base. My friend has a marketing degree and is very good at her job. She suggested that the company contact all of their past customers to see if they need their air ducts cleaned again. She also suggested that they start a referral program where current customers will receive a gift certificate for each new customer that they refer and has their air ducts cleaned. I guess they are also going to talk with the local television station about making a short commercial.