I'm pretty sure he didn't fill them with liquid or have to charge them either.
For me, organic 100% natural cotton doesn't need to be boiled, but my evidence is anecdotal.
It's a preference thing. Do it if you want but there is no real science or research behind if you should or not.
I agree people should do what makes themselves happy. The science hasn't caught up. I like my Japanese Organic Cotton, and if I get a dry hit I would rather it be that cotton. It really becomes a gut level thing for people on what they are comfortable with, or performance preferences.