The spray alone works just fine. My car goes well over a year before the CEL comes on and gotta clean the MAF. That's the only time I clean the k&n as well, so that makes the MAF get dirtier even quicker.
98.5 SVT
91 Escort GT (almost sold)
96 ATX Zetec (i brake to watch you swerve)
FS: SVT rear sway bar
WTB: Very cheap beater
CEG Dragon Run - October 13-15