Vinegar, full strength, is effective against mycobacterium, hence the use of vinegar. Water over 140F is as well.
There are varying reports about the effectiveness of alcohol and hydrogen peroxide (especially because hydrogen peroxide loses its effectiveness very soon after opening.
All that said, I immerse my neb and the mouthpieces from my inhalers as well as the extension tubes in VERY hot (145F) soapy water weekly, soak, scrub, rinse & air dry. Periodically I toss the whole works, in the water, in the microwave for 1 minute, then let it cool - in my oven, that heats the water from 145 to 180, enough to kill just about anything. I used to religiously use vinegar or alcohol, but quit several months ago with no apparent ill effect.
Sue