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There is no single answer to how often windows need cleaning, but there is a right answer for your home. It depends on where you live, what surrounds your property, and how much you notice the glass. For homeowners across the St. Louis area, here is a practical way to think about it.
The General Rule of Thumb
For most residential homes, professional window cleaning twice a year works well. A spring cleaning clears off winter grime and pollen, and a fall cleaning removes the dust and buildup from summer.
This twice-a-year rhythm keeps glass consistently clear without overdoing it. If you only clean once a year, plan it for spring, when pollen and winter residue are heaviest in Missouri. Homes that entertain often or list for sale may want a cleaning on top of that baseline to keep the glass camera-ready.
What Speeds Up the Grime
Several things push a home toward more frequent cleaning. Homes near busy roads collect more dust and exhaust film. Properties surrounded by trees deal with more pollen, sap, and organic debris.
Sprinkler systems are a big one. If your sprinklers hit the glass, hard water spots can appear within weeks, not months. Homes in newer developments in places like Wentzville and O'Fallon often deal with more construction dust in the air as well.
Signs It Is Time
You do not need a calendar to know your windows need attention. Look for a visible haze when the sun hits the glass, water spots that will not wipe away, and dulling around the edges and corners.
Screens tell a story too. If they are visibly dirty, they are transferring that dirt onto the glass every time it rains. If you find yourself cleaning the same spot with a household cleaner and it keeps coming back, that is a sign the buildup has moved past what a wipe can handle.
Interior and Exterior on Different Schedules
The two sides of your glass do not dirty at the same rate. Exteriors face the weather and usually need cleaning more often. Interiors depend on your household, so a home with kids and pets may want interior cleaning more frequently than the exterior.
There is no rule that says both have to happen on the same visit, though many homeowners find it convenient to do them together.
What About New Construction and Move-Ins
Two moments call for cleaning outside the normal rhythm. After a renovation or new build, construction dust and debris settle on the glass and need a dedicated cleanup. And right before or after a move, clean windows make a home show and feel its best. Neither fits a twice-a-year schedule, but both are worth a call when they come up.
Making It Easy to Keep Up
The simplest approach is a standing schedule so clean windows become something you stop thinking about. We can help you set a cadence that fits your home and your budget rather than guessing each season.
If you are not sure where your home falls, Bliss Window Washing can take a look and recommend a schedule that makes sense for your glass. We serve St. Louis, St. Charles, Kirkwood, and the surrounding area. Call or request a free quote to get started.