Take the bolt off completely, the spray with WD40, let it soak..Then pull outwards while wiggling left to right and it should come off. To put them back on, line it up with the hole, but it into the position you want it on the windscreen, then start screwing the bolt back on and it pushes the wiper back on. You CAN'T push the wiper on, you gotta use the bolt to exert the force