Demonstrate what your vacuum cleaner can do. Paying special attention to what the potential buyer just told you about his needs, show him how your product works. If he needs something for hard-to-reach places, use the tool on your vacuum that is designed for those types of situations. You want to demonstrate exactly how excellent your product is, and why it is superior to anything else on the market. Make comparisons, such as "Product A is better than Product B because it has a swivel head"; or "It has more power than any other vacuum like it." Believe in your product and sell it.