Auto deleting submissions?

I can see there's an auto delete app but that's immediate and, besides, I can't seem to try it as it just keeps coming back to the login screen?  What I really need to be able to do is delete all submissions on one form every 72 hours or so.  Is there any way to do that automatically?

Greetings and thank you for your message.

We apologize for the problem you are having with our service.

There is no other option for removing the submissions beside the Auto-delete app.

If you are having a problem accessing it, please try to use the Firefox browser. You should have no problems with it.

Please note that this app removes the submissions instantly as you receive them, and there is no way to postpone removal.

Please let us know if you have any additional questions.