Right, after reading about the wiper removal, I pulled the mechanism out the car to check the spindles both seemed ok, but I stripped them down, cleaned and regreased and put back together, but the wipers are still slow on the first speed. Full speed seems fine, but on slow the wipers move there full range but not quite fast enough. I have just put flat blade wipers on could this be hindering it slightly, also the wiper arms themselves have virtually no splines on them, but once the 17mm nut is tight they don't move out of there typical movement pattern which is good. Help!