Can someone please help me?

Hey Kimc... it depends on what browser you are using.

If it is google Chrome: you click the 3 white dots at the far right of the browser screen, to get to the options > click settings > click privacy and security > then select clear browser history and cache.

Please note that clearing cache removes any information you have on your browser like pages last visited and cookies. So for example once you have cleared cache you will need to re log in with Facebook.

If you are using another browser, simply type into google: how to clear cache on.....XXX and type in the browser you are using.