Review on Tintart Performance Compatible Crosshair Etched Carbon by Dave Branch

After 3 months, black spots began to appear on the front, as if the surface were falling apart (see attached photo). I don't know if it's just my pair or if it's a system issue with these lenses. I have no way of contacting the manufacturer TintartOptics so I'm posting this review. Before that they were very good, but afterwards I'm disappointed.