How Often Should You Clean Your Windows in San Jose?

The short answer for most San Jose homes is twice a year, with a lot of homeowners moving to quarterly once they see the difference. But frequency really depends on what your glass is up against, and in the South Bay that changes block by block.

What Dirties South Bay Glass

Spring brings a heavy pollen load from oak and olive trees that bonds to glass once the first warm days hit. Summer adds dust from dry hillsides and any nearby construction. Then there is the biggest culprit of all: sprinkler overspray, which leaves mineral deposits that etch into glass if they sit long enough.

• Heavy tree cover: clean every 3 months
• Sprinklers hitting windows: every 3 months, plus hard water treatment
• Standard suburban lot: every 6 months
• Near ongoing construction: every 2–3 months while work continues

Why Waiting Costs More

Hard water spotting is the reason. Fresh mineral deposits wipe off with a standard clean. Once they bake in through a couple of summers, removing them takes a dedicated restoration process that costs far more than routine service, and severe cases can permanently haze the glass.

The Simple Rule

If you can see a film when the afternoon sun hits your windows, you're overdue. Set a recurring schedule and you never have to think about it again. Our bi-annual and quarterly plans exist for exactly that reason, and they cost less per visit than one-off cleanings.