I found a few threads that said Bosch may make the wipers for the car oem so I've got some rain x latitudes that will fit in 24 and 18 coming from amazon. That way if the noise still happens after I put them on and down the road then I know it's something other then the blades.
Still disappointed BMW told me its normal and it happens to the wipers. Not very good BMW. But whatever. Hopefully this takes care of the problem.
E92 Space Gray 335i - COBB, BMW Performance Exhaust (stock tips), style 230 rims, LUX H8 AE's