Factory canon efs 18-135 mm lens IS won't manually focus

Hello guys,

This started to happen after I got this wet (there is another totally different problem which started to happen at the same time with the battery). Anyway, it won’t let me manually focus. I have another lens, a macro lens, which manually focuses fine, so seems like the lens. Any possible fix on this or is it likely the water damage roasted this feature?

I believe I tried with another lens in the shop and it was also working fine, so again pretty sure it’s the lens and not the camera for this issue.

Thanks!