I recall doing the same thing with a slivver of wood. I don't recall what machine it was. Replacing the Montgomery Ward switch with a different style...
I imagine the need to add moisture depends on where you are. If you're in high desert where relative humidity is 10% -15% or winter in a heated shop...
I don't find a lack of dealers being a big deal, my Ranger hasn't seen the inside of a Ford dealership in many years. Finding a local shop that knows...
It does seem like HF is trying to up their game. I haven't bought any of their icon branded tools but their pricing and handling them makes me think...