The conceptualization here often is assumed that the toxins are acting like an allergen -- that is, that people should get better right away if they move out of a moldy house, or that they can't get better if they stay in a moldy house.
That doesn't seem quite right. It's more that the poisoning from the toxins is putting stress on the immune system, and other systems of the body.
At a moderate level of being poisoned, people can use various measures to strengthen their system and make a lot of gains or even get a remission. I did that, living in my own moldy house, early on.
Treating yeast and eliminating gluten are two really common ways that people can do this (because candida flare-ups and gluten reactivities are caused by mold exposures), but really anything that helps more people up in terms of their functioning can help. Things related to toxins (such as massage, colonics, Perrin technique) might be particularly helpful at this point.
But if people get further along in the illness, with a higher toxic burden, then eventually those other things may stop working as well for them. That's certainly what happened to me, as the years went by and my body became more and more toxic. After I got to a better environment, a variety of things started working much better again.
Based on my reading of what happened to Crawford, he got away from his exposure and to a good place early in his illness, when his body was still only moderately toxic. He thus was able to recover. My hope is that eventually, that can be the template for everyone who is diagnosed with the illness: clean up the environment or move to a good place. If people do that, they might have a shot at getting better. If they stay in a bad place for years or decades longer, their bodies will become increasingly toxic and recovery likely will be much more difficult.
At least, that's how I'm seeing it.
Best, Lisa