Cache Killer is most effective if used in one of the following two ways:

1. Set the Delete Interval to zero and then keep Cache Killer in your Apple Menu Items folder. Any time you want to purge your cache folders, select Cache Killer from the Apple menu.
2. Set the Delete Interval to your preference (7 days is the default) and then keep Cache Killer (or an alias of Cache Killer) in your Startup Items folder. When your computer starts up, Cache Killer will delete the disk cache if it needs to.