Live and learn. Many customers either don’t realize what is going on with their windows, or do and try to act like they don’t trying to avoid extra cost.
Get in the habit of this disclaimer AT THE ONSET…
“My quote is for normal cleaning of your windows; any additional contaminants such as paint, silicone, and hard to remove smudges of unknown origins, will be an extra charge that we can discuss as I run into them.”
It takes a few times of being burned to stand by this policy.
