You need to remove and discard the wiper arm nut cap(s) and remove the wiper arm nut. Then you need to remove the wiper arm from the wiper arm pivot shaft if the wiper arm fails to release from the pivot shaft with a rocking motion. After that, you need to release the wiper arm blade. Finally, you need to clean the pivot shaft knurls.
By BobGM Specialist
01/11/2022