Any upgrade on the rear window wiper?

[Motosprout]

Rainy weather and dirty road grime builds up on rear window. When using the rear wiper the small area just doesn't give enough of a view behind. Can I use a bigger blade to clean a larger area?

I didn't get the trailer package so I didn't get the rear view mirror with camera option. Probably wouldn't help since the back is covered in road grime anyways.

Maybe I shouldn't care what's behind me....

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