Yesterday something quite odd happened to my 10 month old macbook. I was filling out a form, and the letter b just kept appearing all the time. Then more keys started not working. I opened keyboard viewer today and saw that the b key is constantly pressed (though if i keep pressing the b key it eventually turns off) the J key also gets stuck when the b key is stuck, - and then more keys do not work. The h key is totally unresponsive. I did not spill anything on my computer. Is there any fix for this? Could it just be dirty keys? Or do I need to get a new keyboard for it?