Can you activate the browser's "clear browser data" accessible via a "browser-url", e.g. chrome://settings/clearBrowserData and click the right buttons in there?

Edit: For the above, just to make clear that I mean programmatically via Selenium's get() and via Selelnium's "click-button" etc.

There is also something called "local storage" which you can clear (delete each item in there) via Selenium::Remote::Driver, but this may not cover all the "cache"

bw, bliako