Even Volvo have removed the wiper from their current and new models. Don't know why. And also I seen the new cars with LED headlights don't have washers and why not, they still powerful and get dirty like xenons.
If i don't want mine operate i go gentle on the wiper stalk and and hold less than 2 seconds, hold it any longer then it will activate the headlight washers.
At the same time it also only operators the wipers on one swipe rather than the 4-5 swipes, plus the courtesy swipe
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