This is on my 06 TJ, not my 97 XJ. (I confess!!!) Point being, all bushings, etc. are new and operational. Wiper arms and motor worked 100% but the cheapo wiper blades were leaving streaks on the glass. But even still - the wipers seated properly when the wipers were turned off. Now here I come and flip the arms away from the glass, change the blades, flip em back down, and then turn the wipers on to check the range of motion before applying a reggie decal to the corner of my windshield and . . . passenger wiper is pointing east-northeast. WTF? The blade is fully contacting the glass but the arm is rotated up slightly, so it looks like I turned the wipers off mid sweep. And driving in the rain - the passenger arm never fully lowers to the off position.
If history is any indication, unless I hear otherwise, tomorrow I'm going to give it the Homer "I'll bash you GOOD!" and try to pull one arm while pushing the other to get them in synch, my ASE's be damned.
At least I'm honest.