Yes, bought the BMW stuff straight from the dealer. It's a known issue and I guess that's why it was in stock.
It's a tiny bottle of lubricant with two applicators. One is a small nozzle like you'd get on a tube of super glue and the other is like a small foam pad. Apply it sparingly and slowly with the foam applicator across the felt strips. Quickly follow up with a cloth or it will run.
The felt is the only place I wiped and I think I'm about three weeks in with no noise. We've had loads of warm and then damp weather which seemed to make it worse but nothing since I applied it.
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