Hey Growmie,
The leaves are turning brown because the cleaning product being on the leaves and the light on them has basically burned them, this same thing happens when people spray their plants with things and leave them in the light, I personally don't think you can reverse this, not say that the plant won't grow still but the damage to the leaves will not change, no matter what you do. Hopefully, I answered your question and remember Happy Growing and Free your mind one puff at a time.