Hi men and ladies this is my first post and I hope you can help me out. The wipers of my 1999 g-type astra have started to park in the middle of the windscreen. Im think they have sliped on the linkage because if I push them back manualy when I start the car they return to the middle of the windscreen without me touching the stalk. Anyway could someone tell me how to take off the wiper arms? Then I should be able to remove the plastic cowling and get at the linkage, Iv done a search on here already but faild to find the information I need. Thanks in advance for any help.