How do I reset the visual voice mail indicator on the app?

I have no vmail in my box, but the icon on my Motorola Droid Turbo shows 1 message. Is there a way to force a re-synch or reset the vmail counter?

Accepted answers

You can also clear/delete cache in the VM app in app manager.

Power off and power on fixed it. For now.

You can also clear/delete cache in the VM app in app manager.

Clearing cache and app data both did not fix the problem. A power reset did. Thanks!