MacBook Pro 15' with Retina Display dirt stuck on the edge of Apple logo

HoTiC3 wrote:

...Tomorrow I will try to blow it out with air compressor, but I highly doubt it is going to work because the gap is too tight for air to come inside (at least not with enough power to blow the dirt off)...

While the best advice would be to just leave it alone since it isn't affecting your Mac's operation, if you must use compressed air from a can, be very careful not to either shake the can or tip it while you're blasting its contents at your Mac; doing so while likely cause liquid to be expelled from the can and that will just make things worse.

Another thought. If simple air pressure would blow it out (I don't think it will), have you tried a Q'Tip or something similar? I believe some Q'Tip copies may use some form of plastic foam rather than a cotton tip, but either way, the Tip's surface would be very mildly abrasive, though not enough to scratch the rMBP's cover and scrubbing would tend to capture any particles which are a bit loose.

BTW, my own rMBP 2013 15" has had the back of the monitor exposed for over a year now and I don't see anything like what your image shows. Do you know where that came from and/or what it might be?

okay so I know I'm very very late but this might help others who also need help. What I used to remove bits of playdoh stuck on the edges of my apple symbol (don't ask how it got there) is the apple stickers you get with your apple products since they are very thin and they actually worked for me! use the sharp edge of the apple bite thing to scoop it out. It's hard to explain.

Warm, moist (not dripping wet) microfiber cloth.