I can get enough water in my mouth to fill every test tube and still have some left over to wet my hair......... hey maybe that is why my wife says I taste a little fishy when I kiss her.
Actually I just rinse and dip. If I was getting unwanted results then I would worry about eye droppers, etc.

Actually I just rinse and dip. If I was getting unwanted results then I would worry about eye droppers, etc.