Look at the screen, the pane, and the patio door
A patio view can involve several jobs at once: fingerprints on the inside, dust on exterior glass, a screen in front of the pane, and debris in the door track. Tell us which of those you want addressed. A window-washing line on its own should not leave you guessing about the surrounding details.
For recurring marks, record the pattern rather than choosing a treatment yourself. Are the spots limited to lower panes? Do they face irrigation? Are other nearby windows affected? Those observations help frame the assessment, while the actual condition determines what can be proposed.
Do not assume San Antonio water conditions
Fair Oaks Ranch reports a mix of city wells and purchased GBRA water. That differs from simply applying a San Antonio Water System average to every property. If spots appear near irrigation, show us the affected panes so routine cleaning and possible stain work can be quoted separately.
Local source: Fair Oaks Ranch drinking-water reports.
- Are the marks near sprinkler spray?
- Are solar screens or ordinary screens installed?
- Which patio or second-story panes need special access?