I see you cross post in the Cutler forum does that mean you are using frequent dose DMSA chelation?
There are also a couple of other things you may want to try one is Pantethine (Phase II detoxification) which may not be produced in high enough amounts by the adrenals to detox Ethelene based toxins, more: http://aor.ca/int/related_research/pantethine.php
and TMG which I saw you already had success with by using the lesser Betaine HCL form: