The short answer
Every two weeks for a car that parks outside, every three to four for a garage-kept car, and immediately after anything acidic lands on it. That is more often than the general advice, and the reason is heat.
Hot clear coat is softer and more permeable, and Texas sun concentrates whatever is sitting on it. A bird dropping that would be a nuisance elsewhere is an etched ring here within a day.
Why the interval is shorter here
| Contaminant | How fast it bonds or etches | Season |
|---|---|---|
| Bird droppings | Same day on a hot panel | Year round |
| Love bug residue | Days, acidic | Around May and September |
| Hard water and sprinkler overspray | Bonds within weeks | Year round |
| Tree pollen | Traps moisture, mildly acidic | March to May |
| Brake dust and rail fallout | Bonds progressively | Year round |
| Road brine | Holds moisture on the underbody | After ice events |
What lands on a car in North Texas, and how fast it matters
How you wash matters more than how often
Frequent safe washing is genuinely good for paint. Frequent unsafe washing is the fastest way to destroy it. A car washed weekly in a brush tunnel will look worse in two years than one washed monthly by hand, because every tunnel pass drags grit across the clear coat.
The rules are simple: two buckets, clean mitts, work top down, never wash a hot panel in direct sun, and dry rather than letting hard water evaporate on the paint.
Every two weeks, without doing it yourself
A maintenance exterior detail is 3 to 5 hours and starts at $99, on its own or on a repeating schedule you set.
The exceptions
Wash immediately, not on schedule, after: bird droppings, love bugs, tree sap, a drive through fresh road treatment in winter, and a construction site coating the car in fine dust.
Skip a wash when the car is genuinely clean. Washing a clean car does nothing good and adds a small amount of contact risk, which over years is not nothing.
Adjusting the interval to your parking
| Parking | Interval | Why |
|---|---|---|
| Garage | Every 3 to 4 weeks | No UV, no droppings, no sprinkler overspray |
| Covered carport | Every 2 to 3 weeks | Shielded from sun and most falling debris |
| Open driveway | Every 2 weeks | Full exposure to sun, sap, and hard water |
| Under a tree | Every 2 weeks, plus same-day spot cleaning | Sap and droppings etch within a day in heat |
| Uncovered apartment bay | Every 2 weeks | Full exposure with nowhere to retreat to |
Wash frequency by where the car sleeps
This is an educational guide written to help DFW drivers budget and decide with confidence. It is not a binding quote. Your price is confirmed up front before any work begins, with no deposit.