ACV is great for a mouthwash that kills candida. Baking soda is nice too to create an environement where they will not proliferate. But be aware that the coating of your tongue is mainly due to the distress of your bowels. You will get a pink tongue once again, once your bowels are healthy.
Furhtermore, because we have candida in our sinus cavities, the mouthwash will kill them all, yet they will keep coming back, falling off from the sinus.