I have a product that you spray into your air vents and the foam will travel into the evaporator and clean it, then it will drain out the bottom.
Does anyone know which air vent will lead directly into the evaporator, or which vent would be best to use. Ive searched and the best i could get is, either the centre or passenger side air vent. Any help would be greatly appreciated, or what I should search for to lead me in the right direction.
Any helpers get a

 

Centre vents are always the most direct point to the evap; as the evap is located in the centre of the dash. Most kits will have a long nozzel that can be put a good distance down the vent, id ensure ac button is pressed to ensure evap is exposed. Good luck