Glass does not stay clean on its own. Utah dust, sprinkler overspray, and hard water put the spots right back. A set schedule keeps every pane clear year round, so buildup never gets bad enough to etch the glass.
The tech who quotes it is the tech who cleans it. One point of contact from the first walkthrough to the last pane.
A specific number for your glass, in writing, that does not move once we are on site.
If a pane still hazes after we leave, we come back and finish it. 4.8 stars on Google says the work holds up.
Tell us which windows, the address, and how long the spotting has been there. We will scope it and put a fixed number in writing, for free.