Hi everyone! I have a 13" air os x 10.9.5 and lastly I'm having an issue with my keyboard, it's really strange and I don't know if someone has ever had something like this. When I open it and start using it: the Delete key, the volume up/down, the "a", the "1" and the contrast down keys do not respond for a while. After maybe a few minutes they start working perfectly but it's so strange. Sometimes in a minute, sometimes in 5.... even rebooting doesn't fix it. I haven't upgraded the os because this one works perfectly for me and I never had a single issue with this mac til now. I never got any liquid spilled over the keyboard so I really don't understand what could be!