Okay, first of all, take a deep breath and calm down. lol

You are going to need a rubber glove and a rubber band.

1.) Wrap the rubber band securely around the part you are attempting to open.

2.) Put the rubber glove on the hand that you are going to use to open it.

3.) With your gloved hand, grip the rubber band and grinder.

4.) Apply force (righty tighty, lefty loosey) and the friction between the ruberband and the glove should provide enough torque to successfuly open the stuborn grinder (Or anything that proves difficult to open).

Hope it works!