@Foxfyre,
Hope I am right!!
Go to Tools
Click on Internet Options in the drop down menu
Go to Temporary Internet Files
Click on Delete Files (not cookies...)
You can clear your History too, if you like.
Tip for Luddites.
I downloaded, at Timber's recommendation, a thing called "Crap Cleaner"
http://www.filehippo.com/download_ccleaner/
I use it regularly, and it cleans up all manner of stuff that stuffs up your computer, including cache.