Dumping your Internet cookies is really quite easy and you can remove them yourself. Now what is a cookie? Well here is a thread that will better explain that: What Are Cookies, and Are They Really Dangerous?
How to remove your cookies in Internet Explorer
Tools (upper right hand corner) > Internet Options > General Tab > Browsing History "Delete" > Check the box for cookies > Delete button
How to remove your cookies in Mozilla Firefox
Tools (upper left hand corner) > Options > Privacy tab > "remove individual cookies" > now you can choose between Removing all of the cookies or individual ones