Brake lights won't go out

The rubber bumper for the switch to land against has probably fallen off. You can get a new one at the dealer.

Do the lights go out if you unplug the switch? If so, it's either misadjusted or sticking.

I like Wrenchtech's answer better, especially since he was right.

LOL, thanks Doc. I've seen it many times.
Another thing that works good is a plastic push pin like the ones use to hold plastic shields on.

Ensure the putty is not too thickas there must be sufficient clearance between the switch and stopper.