Becareful with taking your phone apart. You can damage your phone and void the warranty. Now with that said I took my phone apart in 20 minutes using T5 torx screw driver. The phone has 4 screws behind the battery door and 2 screws under the front top cover. Again be very careful taking your phone apart if you do it yourself.
There should be stickers on the screws to show if it's been taken apart... not to mention the bands that break when you do it... I could be wrong, but you prob voided it anyways :-S
...why not just use a q tip and some super-pure (think 80% rubbing alcohol) alcohol and swab it? I did, then scratched at it with my nail hahah... pictures were WAY clearer after tho haha
