Cant get the rear wiper arm off of the stud. I removed the 10mm nut tried pb blaster tried tapping it while pulling on it and tried prying underneath the end of the arm (while trying not to shatter the rear window) I broke the mounting area for the blade which is why I need to remove the arm. I tried an otc brand wiper arm removal tool but the shape of the arm doesn't allow the tool to sit lined up with the end of the wiper post. HELP!!!