What are some ways to clean up profiles of unwanted ECIDs

Hi there,

We have ECIDs enabled as primary identifier on our site, and another CRM ID as an identifier too. Per this article too, I am running into a similar problem with customers logging into different accounts on the same ECID, and the identities are forever stitched. 

Using myself as an example, 

I have a CRM ID and respective ECIDs, and then one day I mistakenly logged into a test account which is used by many other people in the company and on my own ECID. Now my identity graph exploded and I can forever not be segmented.

So I am just wondering if there are ways to clean this up? I have both the Experience events TTL and pseudonymous profile TTL set up. The "login mistake" happened a few months back and so it's way passed the TTL, even though the TTL cleaned the events but the linked identity remains. 

Thank you