I used to work with a couple of lads who never detailed anything. They used to do a fairly good job but never did anything more than slap some water on the windows and squeegee it off. Any marks other than noticable blobs of bird poo just got left.
If i was a paying customer i certainly wouldn't want any visible marks like spider poo and insect guts left on my windows after supposedly being cleaned, and this was reflected in the amount of complaints we used to get.
Hence the reason that as soon as i strarted up on my own it was one price fits all. What i mean by this is i clean absolutely everything in the price i quote for the windows and inform the customer of this when i'm quoting. Get rid of all cobwebs and spiders in corners of frames and glass, wipe all the framework over (not necessarily to a gleaming standard but cleaned), then clean windows and re-do if any marks are still visible, detail edges and finally wipe over sill and framework of excess water.
I do this for absolutely every customer and charge accordingly. If customer's aren't happy with the price then they don't get cleaned but i can assure you, i've not had a single complaint yet and some very nice thank you notes and letters returned with cheques in the post. This to me makes the job well worth doing properly.
If i were to drop my standards for certain customers that just wanted their windows cleaned and nothing else, it would turn into an organisational nightmare. So for me it's high quality cleaning for everyone or nothing at all.
Bit of an essay but i'm feeling chatty today
Sunshine