Rampitt & EWC88:
It was brought to my attention from a good friend of mine who has worked as a GM and Mopar mechanic for over 30 years that cleaning throttle bodies is typically done every 30K miles, more so if you live in the country or dusty areas as opposed to the city.
Also, Mopar makes a specific throttle body cleaner that is made specifically for this cleaning ritual. I don't recommend using brake cleaner or any other solvents other than the Mopar throttle body cleaner, it's only $6.
My truck has a 5.7 Hemi and literally took 5 minutes to remove the throttle body and clean. Extremely easy to do.
As mentioned, don't use any wire brushes, 3M scuff pads, or anything else that will scar the aluminum intake, only use a vinyl brush or even a old tooth brush works great while spraying the T/body intake.