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Question from a car owner: what is the best way to make sure a carwash is not spraying recycled water loaded with salt onto my car in the winter?
I recently had to take a one-month trip and leave my car in a garage for a month. This was the middle of winter, and so I decided to take it to a self-service car wash and spray all the salt off first.
I went to one car wash, which seemed like a decent place, sprayed off the car for five minutes, and left. I get back to the garage, and find it absolutely covered with salt deposits. Pissed, I drive 20 minutes to another car wash, spray it off again, only to come back home and find the same thing. Out of time, and with a plane to catch, I just left it for a month, covered in salt.
What can I do to avoid this?
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Most carwashes use reclaimed water, as does ours. But smart carwash owner/operators (especially in the self serve category) will NOT use reclaimed water for rinsing, drying agents, clearcoat protectants and the like. It’s generally OK to use that reclaim water (which is less a cost-saving measure than an environmental/zoning one) with basic soaps, etc as long as there is a soft water/reverse osmosis rinse to remove the TDS (total dissolved solids) from the wash process.
That same logic applies to ANY kind of wash, whether they use reclaim water or not. You simply cannot put hard water on a car during the rinse cycle (which reclamated water is, amongst other things…like generally being smelly) after it has been cleaned or it will not dry properly nor will it have a relative lack of spotting without the RO treated water.
Reclaim water has also been known to not “set up” the car properly for drying due to it’s inherent “sliminess” whereby it “sticks” to a car.
You’d be surprised to know that most carwashes (including ours) use a Hydroflouric-based soap and/or wheel cleaner.
As noxious as HF is, there simply isn’t a definitive substitute for HF for wheel cleaning and “setting up” a car for a sparkly finish and the way it’s dried.