I cleaned mine about a month ago with the MAF cleaner but it still looks like the frontside is dirty compared to the backside of the sensors.
So temped to LIGHTY
swab it with a q-tip soaked with the cleaner but i don't want to chance breaking the fine little wires.
If i get brave/stupid enough to try i will report back with my results. Maybe i'll try it after a few more weekends of doubletime then a new one will only cost me just over a hour's wages (humblebrag
Can't find the edit button to add this above so i'll just say it seemed to make a bit of a difference, i'll clean it again next oilchange and k&n washing.