Hey Young, your methods may vary, but I have 2 years on my Bosch Icon wiper blade replacements that I bought when I bought my X, and they still wipe clean as can be.

They probably can make it through the winter then get replaced in the spring, just for my own maintenance schedule. All I do is wipe them down with glass cleaner/soap when washing the car, and when dry I give the rubber a wipe with 303 Aerospace protectant.

Been running Icons for 8 years now and always impressed with their longevity.

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2018 Ram 2500 6.7L Cummins 68RFE
19k miles -Bright White/Black - Big Horn Sport - Crew Cab Short Bed
2013 X5 35D (CEO's) - Born on 5/17/2013 -
82k miles - Alpine White/Cinnamon Brown/Premium Pkg, Sport Activity/Premium Pkg and Sound/20" Style 214/Running Boards