[scottfab]

FYI . Way back before the forum when there was only an email list the issue of IAC cleaning came up multiple times. The gist of the experts was not to clean the IAC too thoroughly. There is a special grease used on them that needs to stay (same grease used on the TB plates). Since that time whenever I've cleaned it (every 4yrs) I always clean just what I know to be carbon. The area in the crevices by the shaft I leave alone.
Each to his own though.
An important area to get is the "in" and the "out" to the IAC on the TB.