remove the piece of tube where the MAF is at, its about 6-8" or so then spray the inside towards the MAF, make sure you spray away from the car since i have no clue if the spray could damage the paint or plastics, btw it dries up pretty quick so it shouldnt take you more than 15-20 mins

here the piece of tube im talking about

 

How often do you clean yours?

 

VERY useful thread on this:
http://g35driver.com/forums/showthre...ight=clean+maf

 

Hey guys I clean these all the time at work...all you have to do is unplug the MAF sensor then make sure you do not spray on the car it will eat paint quick...put a container on the underside of sensor spray generously mostly look for the little wire that comes out below the electronis that is the air meter wire. after you have sparyed the entire inside of sensor and there is no more black ****t running down let it dry for about 15 mins, if you have the eletric cleaner you can spray the outside where the plug connects. After it has dried reinstall MAF in place the plug in conector and done...you really can't mess it up unless you touch the little wire inside of it. Good luck guys...remember if you have any doubts just clean your friends car first if you mess theres up don't clean yours...