With nothing selected ‘n’ will simply toggle between turning snapping on and off.
Do this – leave snapping toggled to “off”. When you want snapping “on”, select a clip and start to drag it, hit ‘n’ while you are dragging. Snapping will toggle ‘on’ and then when you drop the clip snapping will toggle back to ‘off’ . That way you can leave snapping off all the time and only toggle it on when you want to. Just remember to start dragging and then hit ‘n’ when you want snapping on.
I had trouble with this in the beginning until I realized exactly what was happening.
NT