When I take a glass

Question

When I take a glass or cup out of the dish washer after they are cleaned and heat dried, or a day plus from the cabinet to put cold water,too many small bubles are floating on top the water surface, as a soap-like condition; it clears up shortly.The tech told me it is normal. I think it is not normal because I suspect the rinsing is not totally complete because of the water conservation design. Am I drinking soap-water?