In my experience, Ctl-F5 doesn't clear the cache. It's more an instruction to reload the page from the source and ignore the cache. It doesn't always work - perhaps related to complexity in the back-end so you're reload may be correctly executed but the data request goes to where it was, before, as that's still cache related. Now you know how to really clear the cache. Something else, as a hint, that I've found useful: and an argument to the URL, like ?xyz=123 or &xyz=123 if there are other arguments. This informs the browser that it needs to look for updated data (or so it thinks). It can be stubborn. Where I work, with virtually everything web-base. My stuff all include a do-not-cache directive in every header.
Ravings en masse^
"The difference between genius and stupidity is that genius has its limits." - Albert Einstein
"If you are searching for perfection in others, then you seek disappointment. If you seek perfection in yourself, then you will find failure." - Balboos HaGadol Mar 2010