From google:

How To Clear Your AOL 9.0 Browser Cache

Setting Cache
From the horizontal toolbar at the top of your screen, click on:
Settings - A box appears called "Settings: Essentials".
Click on Internet [Web] Options - this will launch a window called "AOL Internet Properties".
Click on the 'General' tab.
Under 'Temporary Internet Files', click on the "Settings" button.
On the 'Settings' page, make sure "Every visit to the page" is Selected.
Click OK.
When you return to the 'General' tab, click on "Delete Files" to clear the cache.
Click OK.