Keyboard types by itself

Hello,
This is on my Acer and after I cleaned it(mistake on my part to clean it while my laptop was on)it hasn't worked properly since. It just randomly types O's and Enter's at random intervals making it impossible for me to do anything. It's ONLY those two keys. My pretty sure this isn't a virus because it happened right after I cleaned it and I must of messed things up somehow by pressing random buttons down to clean it. Definitely learned my lesson though and never going to clean a laptop that 's on.