Left mouse buttons on Samsung laptop feels unresponsive.
When I press it, it often has no effect and I have to either press it longer or press it multiple times (pressing it longer seems to be the key though - I think that in thoses cases where it work after pressing multiple times I just pressed it long enough in one of the attempts).
Pressing "longer" here means just long enough to feel unusual, not multiple seconds.
My laptop is a Samsung R610. This behaviour started a few days ago without any obvious reason.
The problem actually went away after a few days. I guess this indicates that the reason might in fact have been some kind of dirt, that eventually disappeared.