Rubbing alcohol is isopropyl alcohol. It evaporates almost instantly leaving completely nothing. Also as PP noted, it's highly flammable.
We got bed bugs just before covid. This is the stuff that finally did for them:
https://www.amazon.co.uk/ROCKWELL-CXID032-CimeXa-Insecticide-Rockwell/dp/B0085HRWI8
It works in a similar way to diatomaceous earth but is much more effective and also safer if you inhale any.
It stays active indefinitiely - i.e. until you hoover it up, so you can pre-treat your beds (watch a few YT videos on how to apply, you only need the lightest of dustings). That way if you have the misfortune of bringing anything home, it'll be dead within a few days.