New Hyundai elantra having issues with spraying white particles out the air vents - looks like fine snow on the cars surfaces. Hyundai dealer has looked at it several times but denies any knowledge of the problem. I've found references to evaporator coatings causing similar issues in other makes of cars. anyone here have this problem - a solution?

 

Try changing the cabin air filter (they have to be changed at intervals anyway can't hurt)