We do a few places with that cr*p self cleaning glass. It has a funny feel to it when you mop it, almost like there is grit on the glass, and the squeegie almost seems to stick as if there is no slip.
As posted above, bird poos will not vannish even after rain, neither does salt (in coastal areas) and neither does traffic film.
Before Christmas we did one huge country Georgian place that had Pilkington Self Cleaning Wonder Glass and the owner asked me to clean half a paine of glass. When he saw the difference between the two he went absolutely berserk. Not at me, but at the fact he'd paid something appraoching £60 000 for the whole place to be done in Pilkington glass just because it was self cleaning.
We had a phone call from last him month saying that he was having standard glass put back in which would be finished by the end of this month and to go and give them a clean when it's done.
He didn't like the tint of the self cleaning glass. Must be nice to have money to spare like that.
Anyway, self cleaning glass? Maybe it does self clean in ideal circumstances but I wouldn't worry about our futures being at stake.
