Thanks very much everyone for your replies.
We are going well now with the oral GSH, mixing with juice in a syringe. He takes it easily most of the time. And he's been so healthy these last few weeks, even with so many sick, coughing kids around.
Unfortunately I'm still confused about the water for nebulising, as I seem to be getting different answers from different people. Saline seems to be most straightforward for me, but Clark Bishop's guidelines say not to use saline. Our pharmacy doesn't sell distilled water, so I'd have to get another supplier for that. Our tap water here is very high in minerals, so I don't want to use it, not even boiled. Any clarification would be appreciated.
Thanks!