I'm having trouble with windshield wiper "chatter", so would like to replace the OEM inserts only, not the whole wiper arm. I have tried RainX but it does not seem to help much. I have watched the video on how to change the inserts on a Bolt. The video shows the wiper arm removed to change the inserts. I plan on getting the Amazon Beigaon 28" silicone insert for $10. My question: Is it possible to remove the old insert and install the new one without taking the wiper arm off?