EvidenceEliminator will nuke all the cookies that you do not tell it you want to keep. You wouldn't believe how much scumware, malware, cookies, and web droppings EE cleans out of there.
A good disc cleaner is worth its weight. Check around for one. Too, try this guy's cleanup links:
http://www.hal-pc.org/~toner27/cleanup.html
Yeah, stuff gets stuck all over my pc probably don't know the half of it. Some of it I don't know what it's for or I'd delete it knowing that it could be recovered with sophisticated software and techniques anyway. Use Win Media Player with FF and it still turns up in my IE8 cache. Some third grader would probably figure that out faster than I did.
I'm going to have to do some more research on this one. Sometimes I do ~think~ I have nuked all my cookies and start over because I do that occasionally, but I doubt that's sufficient.
I resent the sneakiness and deceptiveness of it all. I mean even supposedly reputable sites, what do they need with all that garbage and what do they do with it?