Here's a How To on Clearing Your Browser's Cache
All those files stored in your cache take up space, so from time to time, you may want to clear out the files stored in your cache to free up some space on your computer. This is called clearing the cache.
To clear your cache:
1. On the Internet Explorer 6 Tools menu, click Internet Options. The Internet Options box should open to the General tab.
2. On the General tab, in the Temporary Internet Files section, click the Delete Files button. This will delete all the files that are currently stored in your cache.
The Delete Files button
3. Click OK, and then click OK again.