PCTransplant: Cleanup Process

I was wondering if there was a documented cleanup process of personality captures on the Site Servers.  I haven't been able to find much on if its manual or automated.  It doesn't seem to be automated as were never seeing the captures cleaned up.

Were currently running ITMS 7.5 SP1 HF2, so this might of been resolved in a later HF but I haven't seen any mention of it in the release notes.

Any help would be greatly appriciated.