Hi guys, recently discovered that the windscreen washer jets are getting weak at spray water to my windscreen, at first i thiught it was low on water so i topped it up. Tried it again and same problem accured. It seems to have no power to generate the spray. Everytime I've used it now it only just manages to spray but only at bottom on the windscreen and bonnet any ideas what problem this could be? Or would it be something that needs replacing? Any help be much appreciated thanks, Mike.