For some reason it will not pair. Last night it stopped working, I tried typing. After noticing it was not working, I checked said it was not paired anymore. Ever since then I have not been able to pair it to my mac. How do I reset the keyboard or the bluetooth on my computer? The keyboard works, been using it for months and I changed the batteries. Also the computer bluetooth works because it does discover the keyboard. Plus I can't find the damn serial number for the damn thing to return it.