Before you go and buy new mirrors, try one thing. I experienced the exact same symptoms and this fixed it. Take the mirror part off by manually pushing on the left or right side. This will make the opposite stick out. Place your hand behind this opposite side and pull. It pops right off. This take the unit out in the middle of the mirror by removing the one screw. Clean out all the grease and then generously apply more grease. Put it all back together and more everything aournd to work it in. This fixed mine.