Wait until it just stops working altogether. It's happened on 2 computers I've seen, one was mine. It's like the DNS lookup part of the browser had better things to do and wouldn't resolve any sites at all.
I couldn't repair it, because the only copies of the IE6 were on disks that I had from other stuff, all of which were an older version, so it refused to update.
I couldn't uninstall it all the way, because, you know, monopoly.
I finally talked with people in game who suggested Firefox, then managed to download that through a very basic browser that came on a CAD program.
4 months later, IE6 just started working again, and yelled at me for not doing some update or other.