my front window whiper (if thats how you spell it) stops working every now and then.... it's just like it need some help to get started, then it can work for a couple of weeks before it's stops again and need some help to start... and it starts of slow and it's just like it needs to run the panorama a couple of times before it realy kicks in...

any idea what this could be ??? do i need to have some grease or something on it ???