The Cache Clearing Process

A common fix for performance issues with CLASS is to clear your browser cache. Previously stored data may be interfering with the way CLASS performs. This may log you out of all services you are logged into on your web browser, so you might want to have log in details ready to go, so you can log back into them.

You could start by trying incognito mode. This will let you use CLASS without the stored data – the data that could be interfering.

How to use incognito mode:

  1. In the Google Chrome browser, go to the 3 vertical dots on the top right hand side.

  2. From the drop down menu, select New Incognito Window.

  3. Log back into CLASS at on that new darker window.

  4. Try the part of CLASS that was not working for you.

  5. If that helps you may have to clear your cache, but even if it doesn’t, you can now close this new darker window.

 This is a screenshot of the menu you need to open an incognito window:

Note: On the Microsoft Edge Browser, you can try this test, but instead of three vertical dots, it’s 3 horizontal dots. And, instead of “New Incognito Window”, it’s “New In Private Window”. We only suggest using either Chrome or Edge to interact with CLASS. 


If CLASS works normally using that last test, you might be able to fix your issue permanently by clearing your browser history.

How to clear your browser history:

  1. In the Google Chrome browser, click on the three vertical dots in the top right corner.

  2. In the drop down menu, select More Tools, then Clear Browsing Data.

  3. From Time Range, select All Time.

  4. Tick all boxes apart from Passwords and Other Sign-In Data.

  5. Make sure to tick all boxes from both Basic and Advanced besides passwords.

  6. Click Clear data.

  7. Once the process is done, close and reopen Google Chrome, and try accessing CLASS again.

Learn more about clearing your cache here.


If all of the above fails, please contact the helpdesk.