Sean C,
I think your example leaves a lot to be desired, I am sure if you did a survey of customers that asked for there windows to be cleaned, they would expect that meant just the glass the bit they see out of! And they would expect to pay more for the frames to be cleaned. So I think the name `Window Cleaner` is quite appropriate whether you clean the glass, or glass and frames as not all customers are bothered about there frames anyway, so why should they pay for it if they don`t want it, I guess it is each to there own, but I would prefer to give my customers the option and as I said earlier I think it is completely unnecessary to clean them on every visit unless you only call twice a year