‒ →
Using a pair of pliers press together both steel strips on the enclosed side of the rubber, slide sideways out of the upper clip and remove rubber complete with strips from the other clips of the wiper blades.
‒ →
Insert new rubber into lower clips of wiper blade.
‒ Insert both strips in the first groove of the rubber so that the recesses in the strips face the rubber and engage in the rubber lugs of the groove.
‒ Using pliers press both steel strips and rubber together and insert in the upper clips so that the lugs of the clips on both sides engage in the retaining slots (arrow) of the wiper blade rubber.