Honestly, that scare tactic is a total gamble. You might get one person who changes, but how many just get anxious and avoid coming back at all? Slow nudges build trust, so when you do find a problem, they actually listen. A big scare just feels like punishment, and who sticks with a habit built on fear?

My old straight bit seemed fine until I tried a spiral.

Spot what @hayden_williams12 said about willpower fading... that's the whole game right there.

What ramp rate did you use for the heating cycle, and how thick was the glass you were working with?

Seriously, @linda2, that's the best kind of home character.