Ron,
Let me thank you again for your efforts in neutralizing the residual odors left from my wife’s smoking habit. The results of  your applications were very instrumental in the sale of the house. You brought a high degree of professionalism and knowledge of your product to the dinner table. I could always count on your responsiveness and your delivering what you had promised. And the cost was  a fraction of the cost of  painting the interior of my house. Thanks again for a job well done.
Roger Ohlandt