I did that the 1st time or two,since my LHBS re-packaged it as no rinse. Knowing better now,rinse the cleaner & leave the starsan on the surfaces. So I got lucky the first time or two with no off flavors,but I tend to think that was because of the amount in teaspoons of cleaner his label said to use. Now I buy the PBW by the pound in it's own jar. All needed instructions for strengths needed to clean various things is on the label.