You can clear your cache (that is, delete all the files in your cache) if they begin to occupy too much hard drive space, or if the files get out of date and no longer correspond to the files on the Web server.
How do I clear my cache?
You might want to delete all the files in your cache if they begin to occupy too much hard drive space, or if the files get out of date and no longer correspond to the files on the Web server.
To clear your cache with Internet Explorer 4+



To clear your cache with Netscape Communicator 4 Each profile
in Netscape Communicator has its own cache. If you are using profiles
to share the use of Communicator, you are not clearing the cache for the
other profiles
when you clear your own cache.
with Macintosh ) next to Advanced.

Netscape Communicator 4 for Windows 
Netscape Communicator 4 for Macintosh
To clear your cache with Netscape Navigator 3

Netscape Navigator 3 for Windows

Netscape Navigator 3 for Macintosh