Short answer. No one other than Mills can see them :-) and he's not letting anyone borrow his hydrinoscope.
Anyway, from the perspective of common sense, why would Mills not claim that (since energy has been given up with reduced orbitals), there would be a slight mass decrease in what can only be called "ash" ? From: Terry Blanton Does the relative mass of a hydrino increase with each reduced orbital radius due to the increase angular momentum of the orbiting electron?

