Scheduling cleanup of cache folder

Hello, thank you for the great plugin.

Is there a way to schedule a cleanup of the cache folder from inside WordPress?

Alternatively, could you tell me where, in your plugin files, I could safely add a “insert(‘myscript.php’);” line to have some code executed before the plugin runs?

The code would check the current date against a value stored in a database and eventually empty the cache folder if criteria are met. I’d do this without the need of WP to be loaded, minimising the added overhead.