You delete cookies and cache files in your browser's settings. A browser is the program you use to access various websites (e.g. Firefox, Safari, Chrome or Edge).
How you remove them depends on which browser you use. You can follow one of these guides on how to remove them:
- Chrome: Clear cache & cookies
- Firefox: Clear cookies and site data
- Edge: Remove cookies
- Safari on Mac: https://support.apple.com/en-gb/guide/safari/sfri11471/mac
- Safari on iPhone/iPad: https://support.apple.com/en-gb/HT201265