The really interesting thing about the "cleaning cycle" discovery is that no one has checked for it before in people with neurological symptoms. Maybe CSF flow isn't a part of ME or LC, but we can't be sure if no one has bothered to look. It's also a brief intermittent effect, so it needs 24 hr/day monitoring while the subject does different activities. Well, there could be a long-term abnormality compared to controls, but again, has anyone looked? There are probably other subsystem functions that are yet to be discovered.