hchau5
1. Your blade could be shot if it hits the rubber edge . I should clip in place or have a plastic pin to hold it.
2. The cam slide under the hub cover could be loose . If you have loud clicking
metallic sounds when the motor runs / wipes , I bet it needs lube or screws tighten on the side guides.
Try cheap first = new wiper blade $5 -$20
Uboater