Like many of us, I don't drive my GN from Thanksgiving until Easter. Each year I check TPS and IAC readings to get off on the right start. I usually start with an IAC setting of 10 and rarely have to touch it after that because it stays within that 0-20 range all season long. I have developed the habit of taking a look at both of these on the scanmaster when putting the car away (while I am letting the turbo cool down). This year I have noticed that most of the time the IAC is reading in the 50's at warm idle after a drive.(car continues to run perfectly) If I shut off the engine and restart, IAC reads at 0 and climbs to around 6-10. Is this a sign that the IAC needs to be cleaned? Or beginning to fail? Just wondering.