This was one of the stupidest claims I have read in a long time.  His test essentially is to take a black (or dark) dish of some time, pour your water to be tested in it and let it evaporate.  How does it work?  Sodium fluoride is a white powder.  So if you see any white power residue then that is sodium fluoride.  That is only slightly true and then only if sodium fluoride is actually present.  At 1 part per million fluoride is vastly out numbered by the calcium, magnesium, sodium and potassium salts present that are also white that are present.  Be sure to repeat using a known fluoride free rinking water.  Bet it's residue looks the same.

I don't particularly think such patent nonsense is particularly helpful to the anti-fluoridation argument.