I purchased a wagtail and fitted it with a liquidator 14 inch channel and razr rubber I also have a standard hamdle with a 10 inch liquidator channel with the black rubber it came with. When using the wagtail combo, i just cant get it to work. Constantly leaving streaks or water in the middle of the window and loads around the edge in small areas. Im just not getting the benefits im meant to. Ive tried more soap/less soap, more water, holding it at different angles, different pressures etc etc. Sometimes I have a good window but all too rare. Im wondering if the razr rubber is good in scotland at this time of year? Have i put the channel in at the right angle(looks ok)?, Are the end clips bent in enough(ive tried a lot of different angles)? I definitely see a difference with the 10 inch and normal handle and blacl rubber but again im not getting the benefit that im meant to with the liquidator.