Hello! I've been advised to clean my MBP fan's out with compressed air, since I've owned it for 6 months now. So my question is, where would I actually spray the compressed air without opening the chassis? I'm scared to use it on the keyboard because I've heard keys popping off that way, and wondering if I spray into the vent below the screen, I would just blow the dust deeper into the computer.... I've googled and searched this up with no relating topics.... Anyone got any advice? Thanks in advance!