I was recently at the beach and got a little sand in my headset jack. After I got back from the beach my headset icon started blinking on and off randomly. I blew out the sand using compressed air and that fixed the problem, but only for a minute or two. I took the phone apart and blasted the inside with air, but it still didn't fix the problem. Does anyone have any ideas on what I could do to fix it? Is there a way to turn off auto detect headset?