Do you guys use screen protectors on your touch screens? My key pad phones would always scratch so I use them out of habit, but if touch screens are meant to be touched I'm wondering if they are more durable. I keep nothing in my pocket with my phone other than chapstick but my pockets get dirty on occasion however its not like the phone is bouncing around in a purse or grinding against keys in some knuckleheads skinny jeans so I was wondering if I'm wasting my time.