Almost always, yes — and on the same visit. Interior and exterior windows collect completely different things, and cleaning only one side leaves the glass looking half-done from wherever you're standing.
What the outside collects
- Dust and pollen — heaviest in Bay Area spring and dry summer.
- Hard-water spots from sprinklers hitting glass.
- Salt film from coastal air and Bay winds.
- Bird droppings, spider webs and tree sap.
What the inside collects
- Cooking film, especially near kitchens.
- Fingerprints — most families notice these long before dust.
- HVAC dust settling on sills and interior glass.
- Pet nose prints (very common — no shame).
Why one visit is smarter than two
The setup, drop cloths and paperwork are the same either way. Booking interior + exterior on one visit is typically only marginally more than exterior alone — and you get a home that actually looks clean from both sides. Splitting the two visits usually costs more overall and leaves an obvious visual mismatch in between.
One exception
If you have brand-new construction and interior windows haven't been touched, an interior-only detail (glass, sills, tracks, hardware) is a great one-time service on its own.
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Get a free quote for window cleaning.
Response within the hour. Starting from From $149.
