AR Cleanliness - the chamber

With the explosion of the "black rifle" market after the election, there are a lot of new shooters that wonder what is the proper way to clean their AR?
The key part that needs to be cleaned is the chamber. Since some manufactures ship AR's with tight chambers, a dirty chamber and some ammunition can cause failures to extract and even stuck cases. Therefore, invest $10 or so into a USGI cleaning kit that comes with a chamber brush, and use it!
If nothing else, just clean your chamber.