Hi all, I’ve got an issue with my windscreen wipers where the bottom half of the blade wobbles as it moves up and down the windscreen. It also doesn’t clear water too well and tends to form a water trail as it moves which fades after a second or so. I’ve replaced the blade with another brand and it still has the same issue, so I’m starting to think the issue lies with the connection between the wiper arm and the blade, perhaps it is getting loose. Would replacing the entire wiper arm help?