un-steady idle

hello all. when i pull into my parking spot, i shift into park and shut my a/c off. after i shut my a/c off my idle RPMs take a serious dive (to about 500) then bounce back up, and then it just keeps bouncing. i can shut the car off, and start it right back up, and everything will be perfect again....

any suggestions?

Clean the IAC motor and its passage in the throttle body. Then check for vacuum leaks.

will carburetor cleaner be ok to use?

Yes that would be alright. here's a link with some info about it:

IAC cleaning (http://www.ehow.com/how_2301261_clean-air-control-motor-valve.html)