We all have our screw ups, even I make mistakes. I would water them like normal, your roots will figure themselves out. I have a good feeling that your plant will be ok
I think it was a small reaction to the oil, giving them a burnt look
For paphs I did an oil treatment and the new root tips become brown. They continued to grow even though they were browned. (I know they are different than a cattleya, paphs definitely have more sensitive roots than a catt)
You can spray them if you want, but be careful not to have them wet all the time because that can cause more trouble with rot.
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