Auto Fill feature

Question: With the Auto Fill feature, after I submit the form, and then come back to test again, I would expect the auto-fill data to be cleared as I submitted my form. Or is it only cleared when the expiration date arrives, which I set to 2 days

Unfortunately the auto-fill feature stores the data in your browser.  To clear it, you would need to clear your browsers cache and cookies. It will also be cleared when expiration date arrives. 

As a workaround, it is possible to add a 'Clear Form' button inside of your form. In this way, user will need to manually click on it do clear data from the form.

Hope this will help. Let us know if you need further assistance.