Atari 800 sticky Atari key

When pulling my 800 from storage I found the Atari (Fuji) key to be sticky. I can't really remember but maybe it was a bit "weak" already 30 years ago.... Sometimes it just sticks in the depressed position which is a nuisance, given I often hit it instead of the shift key Usually a few careful taps will let it return to the "not depressed" position.

Thanks for any hints on how to "unstick" it? Cleaning? New Spring?