When you forgo Epsom Salts , you absolutely must do either a Salt Water Flush, enema or colonic on the day after, or yes, the toxins will sit in the intestines way too long and end up recirculating.
I think that actually, the SWF (Salt-Water-Flush) is much to be desired as it's the only one that hits the small intestine, and many people have problems digesting all that oil so the small intestine gets clogged, which thten clogs the lymphs. But if you take the right dose than enema/colonic should be good enough.
I don't take the ES, I just do an enema, and try to do at least 3 of them post-flush.