Hello. I have only cleaned my own polycarbonate conservatory roof before at my old house some time ago. Never done one for a customer. I'm going to quote for one later today and wondered if there was anything to be aware of/any tips please? I looked on Google maps and I have a feeling it's self cleaning glass (blue tinted) which might be an issue anyway. But if it's not I just don't want to make a mess of the quote or anything. Thank you very much.