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This is a mini squeegee, designed for use with old (or new, I won’t judge) car wiper blades. Simply slide the blade into the handle and cut to length. I used needle nose pliers to help slide it into place. It stays firmly in place without any glue. I had this idea while struggling to clean my car mirror at the pump with their big window squeegee. Please post your makes if you print one! :)
UPDATE 2019/11/30 - V2
I posted a second version of the model where I flattened the front of the squeegee to leave more wiggle room for the blade. It should clean better and the wiper blade should no longer get stuck.
UPDATE 2020/01/30 - V3
I uploaded a larger version I just made :)