Go see a manicurist.. or just bite down on them and split them down the middle. That hurts the most, but it gets them off fast. How long have you you had them on for?
I remember when I was younger, my sister and I had fake nails. I was a little rambunctious when I would play, so they all got ripped off : p.. I don't use them any more .. I'm not sure how they come off except either ripping them off, or letting them fall off