I have never boiled mine. Per my instructions (NJH) I just use “only” Seventh Generation dish soap…soak in hot or warm water…as long as I allow…then air dry on dish rack. When traveling, I use alcohol spray or peroxide spray on all separated parts, let sit few minutes, then rinse & air dry.
This is just my routine…but important note “I do NOT produce any (at all) sputum…and all my submissions for cultures (of saliva) @ NJH come back negative (what a surprise)”. I do huff cough and hear wheezing and rattling, but useless to bring anything up, and they do see the nodules and inflammation on scans.; however, for the purposes of Aerobika cleaning…that is my routine and seems to be working.

Stay healthy.
Regina