Earlier today I dropped my iPhone in the rain, it was raining moderatly and I didn't pick it up until about 20 minutes ago. It had water on it but I managed to clean it off. I turned it on really quckly to turn it off. I think very little water got in, if any. How long should I leave it off? It had a cover over it and a screen protector. It was faced up when I found it in the water next to my car.