We both started doing it around the same time, clearing the cache means erasing history, yes? Getting rid of all cookies. She has a new phone so do I. I'll get her to try that on hers and see. Thank you.
No, refreshing your cache doesn't erase history, but deleting cookies will! On most browsers, open the page and use ctrl-R or F5 or clicking the refresh toolbar button.
You may need to use control-F5 (or control-click the refresh button) on chrome to really force a refresh. All this is doing is discarding all scripts and page data, and pulling a new copy from the server. Your cookies will still be sent to the server and used, so your history will stick.