Wash a car you drive every day about every two weeks. In winter, if your roads are salted, keep to every two weeks at minimum and go sooner after a snowstorm, with an undercarriage rinse each time. Bird droppings, tree sap, and bug splatter shouldn't wait for the next wash; clean them off as soon as you see them.
The schedule matters less than what's sitting on the paint. A car that lives in a garage and comes out on weekends can go a month between washes. A car parked under a tree next to a busy road may need a rinse every week.
How often to wash your car, by situation#
| Your situation |
How often |
| Daily driver, parked outside, normal weather |
Every 2 weeks |
| Winter driving on salted roads |
Every 2 weeks at least, plus after heavy snow, with an undercarriage wash |
| Parked under trees or where birds roost |
Weekly, or spot-clean as needed |
| Garaged, driven lightly |
Every 3 to 4 weeks |
| After a long summer drive |
Within a few days, to get the bugs off |
| Dusty dirt roads or construction areas |
Whenever it's visibly coated |
Why bird droppings and sap can't wait#
They eat into the finish. Toyota's car care advice warns that letting dead bugs, bird droppings, dirt, and chemicals build up on your car can strip away the wax and eventually the paint, and that paint without its protective layer can start to rust.
Don't scrub a dried-on dropping off a dry panel. That grinds grit into the clear coat. Soak it first: lay a wet microfiber cloth over it for a few minutes, or use a quick-detailer spray, then lift it off gently. Tree sap is stickier; a dedicated sap or tar remover works better than scrubbing harder.
Washing your car in winter#
Road salt is the main reason to wash more in winter, not less. Salt and brine spray up and collect on the underside of the car, where you can't see rust starting. AAA's guidance on road salt damage suggests washing every two weeks during winter, more often after heavy snowfall, and says the wash should include the undercarriage.
A drive-through wash with an underbody spray is the easiest way to do that in freezing weather. Pick a day when it's above freezing if you can, so water doesn't freeze in door seals and locks. A coat of wax before winter makes it harder for salty slush to stick.
How to wash a car by hand#
- Park in the shade and let the panels cool. Soap that dries on hot paint leaves spots.
- Rinse the whole car with plain water to knock off loose grit before anything touches the paint.
- Fill two buckets: one with car wash soap and water, one with plain water to rinse the mitt. Dunk the dirty mitt in the rinse bucket before it goes back in the soap, so you're not rubbing yesterday's grit back onto the car.
- Wash from the roof down, one section at a time, rinsing as you go. The lower panels are the dirtiest, so they go last.
- Do the wheels and tires with a separate brush or mitt. Brake dust is abrasive, and you don't want it anywhere near your paint.
- Rinse thoroughly, then dry with a clean, soft microfiber towel before water spots form.
Use soap made for cars. Toyota says not to use household cleaners like hand soap or glass cleaner on the paint, because they can strip the protective wax. Dish soap falls in the same category.
Keep your drying towels clean and lint-free. Washing microfiber cloths without fabric softener keeps them absorbent; a towel full of trapped grit will scratch.
Is it better to wash at home or at a car wash?#
For the environment, a commercial car wash usually wins. The EPA points out that commercial car washes are required to dispose of their wastewater properly, while soapy water from a driveway runs straight into the storm drain. If you wash at home, do it on grass or gravel so the water filters through the ground, and use a small amount of phosphate-free soap. Some towns have local rules on washing cars in the street, so check yours.
For the paint, it depends on the wash. Brush and cloth tunnel washes can leave fine swirl marks over time, especially on dark colors. Touchless washes avoid that but rely on stronger chemicals to loosen dirt. A careful hand wash is gentlest, and a careless one, with one bucket and a dropped sponge, can be the worst of all.
Before you take a newer car through an automatic wash, check the manual. Some cars have a car wash mode, or specific instructions about automatic wipers, folding mirrors, and parking sensors. Matte paint, wraps, and some special wheel finishes have their own care instructions too.
How often to wax a car#
At least twice a year: once before winter and once in spring after the salt is gone. Wax doesn't stop rust on its own, but it gives road grime and droppings something to sit on other than your clear coat, and it makes the car easier to wash. Spray sealants can be added more often if you like a high shine.
Don't forget the glass#
While you're at it, clean the windshield and wipe the rubber edge of the wiper blades with a damp cloth. Grime on the glass is one of the main reasons wipers streak. If they still smear on a clean windshield, it's time to replace the wipers.
A ChoreLists.com reminder every two weeks is a good default, and you can bump it to weekly over winter. It also helps to fold the wash into your monthly car maintenance checks, since a clean car makes it easier to spot new dents, chips, and a burned-out bulb.