Why the question of how often to wash your car is so important
Washing too infrequently is harmful.
Washing incorrectly too often is even more damaging.
The problem is not the frequency – but how and under what conditions washing is done.
The two extremes – both wrong
Wash too infrequently
Dirt, salt, insects and brake dust remain on the paintwork for a long time.
This leads to:
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burnt-on residues
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Rust formation
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dull paint
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higher care requirements later
Wash too often – but incorrectly
Daily car washes or poor hand washing cause:
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micro-scratches
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Swirls
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faster clear coat wear
How often should I wash my car? The clear answer
Everyday vehicle (city & country)
Every 2-3 weeks is ideal – provided it's washed correctly.
You can find suitable car care products directly here:
https://7wash.ch
Winter operation or salt
Every 1-2 weeks , sometimes even weekly.
This is not about appearance, but about preventing rust .
Especially important:
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underbody
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wheel arches
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Rims
Summer operation
Every 2–4 weeks , depending on:
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Insect remains
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Bird droppings
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Tree resin
These residues chemically attack the paint and should not remain for long .
Low-mileage vehicle / garage-kept vehicle
Even stationary vehicles get dirty.
Every 4-6 weeks is sufficient, as long as no aggressive residues are present.
What the washing frequency really depends on
Not from the calendar, but from:
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Salt
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insects
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Brake dust
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pollution
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protective layer on the paint
A protected paint finish stays clean longer and is easier to clean.
You can find suitable care and protection products here: https://7wash.ch
Car wash vs. hand wash
You can hand wash your body more often than you can use a car wash.
A bad car wash causes more damage than infrequent washing.
If washing is done frequently, then do so gently .
The most important rule
Don't ask:
How often should I wash?
Rather:
Is there dirt on the car that could cause damage?
If so → wash.
If no → wait.
Summary
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2–3 weeks is the average
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more often in winter
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Summer dependent on insects
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Protection extends intervals
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Improper washing is worse than infrequent washing.
