Dr. Tom Giacobbi returns this week with another installment of his "Just a Minute, Doc" series to bust a big myth when it comes to infection control, especially with your dental unit waterlines. Does clean water stay clean in your dental practice? "Let's take a minute to talk about dental unit water lines. It's a myth that if you put clean water into your dental unit, that clean water is going to come out. Make sure you log your success as you go, because many states have specific requirements regarding this, and yours might be next.