One method that will work to delay, if not offset permanent damage to the plants, or end in their death, is to cleanse the contaminated whitened areas thoroughly with a white vinegar base using a new sponge or soft rag. If the discretion returns you can try altering your watering method or habits (i.e. using a bulb or ice cubes instead of spray bottle, or integrating a watering routine three times weekly as to every other day, etc). Then also cleanse the affected areas again so that the contamination doesn't spread among the leaves or to the other plants. Good luck!
One method that will work to delay, if not offset permanent damage to the plants, or end in their death, is to cleanse the contaminated whitened areas thoroughly with a white vinegar base using a new sponge or soft rag. If the discretion returns you can try altering your watering method or habits (i.e. using a bulb or ice cubes instead of spray bottle, or integrating a watering routine three times weekly as to every other day, etc). Then also cleanse the affected areas again so that the contamination doesn't spread among the leaves or to the other plants. Good luck!