My understanding is that it is OK in reducing cleaning bills to a certain extent for industrial use such as shopping mall roofs etc, but in a domestic situation it's not that hot! Any self respecting housewife won't accept it! (And what about those mucky frames and cills)
Modified to add:- looked at the Pilkington site where under benefits it says that in dry spells you can hose it down or use warm soapy water! Who's gonna do that then?
There's one born every day!
Stuart - when she comes back grovelling explain it costs more to clean self-cleaning glass than normal!
LOL - sorry, I'm in a silly mood tonight!