Can you save a deiffenbachia plant exposed to a cleaning chemical?

Question

Two dieffenbachia plants in same location, watered and sunlight the same and one is fine and the other is drooping, yellowing leaves and they fall of at the slightest touch. Not over or under watered, someone said it looks like it has had some type of cleaning product on it causing to do this.

Answer 1

If all the foliage is affected, and there is no green terminal growth emerging at the top, then it may be lost. If there is some green foliage, then take it outside or into the bathroom and hose it all off and flush the soil with copius amounts of water to dilute and leach the possible chemical contamination. If the plant has been in the same container for two years or more then consider repotting with fresh potting soil. Ensure good drainage holes are there and don't let it sit in a saucer or outer decorative pot full of water. Consider that with the same growing condtions and management, that the other plant may not be far behind in developing the same disorder. Repot it also.

https://www.gardeningknowhow.com/houseplants/dumb-cane/growing-dumbcane-dieffenbachia.htm