Powerful one step maintenance for use on air conditioner and evaporator coils. pH neutral self-rinsing formula. Special penetrating action. Phosphate-free. Non-acid, non-abrasive, non-corrosive, non-toxic, non-pitting. Simplex coil cleaner adds a one-two punch to fan coil air conditioner pre-season start up and maintenance. It cleans both air conditioning and evaporator fan coils in minutes.