The data from the previous form submission still shows up when I open up a new form. The data doesn't clear out.
This could be because the Ditto feature could be turned on in the device settings. Please go to the App Settings> Advanced Settings> Use Ditto - turn this feature off.
Once you do that try to reconcile your app and see if it clears out the data. If it doesn't, you can manually delete the older data from the form, and after submitting the form, you should not be seeing the data on your next new form.