use a electronic circuit cleaner to spray on the sensor wires shown below.
use a cleaner that does not leave a residue, DO NOT USE WD-40, it leaves a greasy residue and will ruin the sensor.
after sensor is dry, you can wipe it gently with a soft cloth, but do not press the sensor wires, they can get damaged easily !
After the sensor has dried for 30 minutes, you can put it back in the air filter box, place a cloth under the air filter box so that you do not loose the screws while putting them on (it happened with me):
if you do it correctly, the car will be alarm free when you reconnect the battery and start it.
Please let me know if anyone tries it !!!