Just to revisit this. We make very little money to clean windows. Therr could be jobs you’re estimating that are 275 -375.
I try not to waste my time, and do in person for those
This isn’t home improvements were out tickets are 5,000 - 75,000, and in person quotes are a must.
So how can anyone want to dedicate the time to go over every window to see what’s required .
Especially if you’re a one truck operation. By all means if you need to keep 3-10 trucks busy, then maybe that’s a different story, or if you’re new and clients are minimal
Once things slow up, then I’m more inclined to do in person estimates. Your close rate will go up.
So I’m telling you just do the estimates the way I have on mine, and when cleaning and you notice hard water staining , oxidation that’s when you bring it to their attention. I don’t even go over all the idiosyncraties so to speak on the phone.
I just want to see how many and what type, and send an estimate.
Bigger houses 50 -100 plus windows I like to go to, don’t want to under bid those. So more than likely I’m going to look.
Everything is in that estimate that I’m doing and not doing. That’s all !! It’s common sense there cleaning and restoration, and construction cleaning. They all are different labors required to get done, at different cost
Anyone do all for the same costs are leaving money on the table and not running a profitable business. Hey but atleast they feel good about themselves. 
Don’t feel bad if they don’t want to restore their glass. Just like dont feel bad if you just an exterior clean and the insides are dirty.
I read so many times guys don’t do exteriors, because insides are dirty too. Well duh ! that’s common sense. Things get dirty, and if all they want is exterior that’s not my problem. Maybe they just want to save money, and do it themselves. That happens a lot.