Not a good idea as the added drag might fry the motor. It may be too much through parts of the sweep.
I too thought of the arms. The OP didn’t mention the year of the car, but the articulated portion of the arm can become corroded and cause these types of problems. The entire arms can be easily replaced. I think the last time I checked, a replaement arm was about $25 at the parts store. A puller may be necessary to free the arm from its splined post, but pullers are cheap too.