I have a web app. that uses a portal and sub portal, it also create XML docs in the userdata folder as well. Is there anyway to delete or expire the XML docs from the user's pc?

The problem I 'm having is that the folder is filling up on the user and they are getting a disk is full error message. Can I expire the XML docs after so many hours, or is there a way to remove the xml docs when the user shuts down the sub portal that is generated?



thanks