The bottom line in relationship marketing is that it takes time and you cannot rush people. It may take six days to six months or longer. The key of relationship marketing is persistence, consistency and a willingness to answer any and every question you are asked about products. After all, you are trying to create a relationship — it is a give and take and above all else, trust.
Send all of your best information, news and changes in the industry to your best customers — but do not attempt to sell them anything. What you want is communication, knowledge and information going to the best people who share what they get through word-of-mouth. Try it and see what happens.