My Veek has had a new mode button fitted already, this replacement is now sticking down as was the old one.
This seems a common problem...
In my frustration, I took the whole unit off, packed some dielectric grease into it from underneath,having tried liquid lubes with no joy, and after a little repetitive pressing it has freed off nicely, it has lasted a week in the weather, so I anticipate some level of success, just a tip for a potential cure to the glitch.
I really did pack it well so it oozed out everywhere, and it took a little purging to free off.