I spray silicone spray down the edge of the open window. I've also used Teflon and the improvement is immediate. Use the long stick.

If you can't find steel zip tie you can go "OG" with steel wire. I'm pretty sure my original post is on xo with the steel wire method I did first. That's just as strong it's just a lot harder to implement.

The clips don't break from lack of lubrication at the clip they break because of too much friction on the glass through the felt guides at front and back. I've measured a 60% increase in speed of the window with one application.

While waiting for parts you can use the key to roll down a window to reach inside to open. I had to do that for over a month in the past.

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2011 E70 • N55 (me)
2012 E70 • N63 (wife)