My mom's Macbook keyboard has been acting erratically as of late. At first the keyboard was giving text that could only be used when holding down the option key. I turned off the option key and it worked for a while. An hour later the keyboard starts showing gibberish again and it's unresponsive. I have taken into account that periodically that my mom wipes down the keyboard but it doesn't seem to be a problem of sorts, though I'm not ruling that out. Any other Mac users have had this problem before?