Need advice about auto misters

[DoodlesTheSnake]

I noticed a spot on my ball pythons head and a line on his underside that looked like scale rot. The humidity is around 70%. I am not home most of the day so I bought an auto mister. I have heard that auto misters can cause scale rot.

[Aaron_S]

Scale rot occurs not only in wet substrate but it has to be prolonged periods of time as well as dirty substrate. It doesn't usually happen from simply a wet substrate, although I bet it could but a REALLY long time of it.

What substrate do you use? It's possible it's discolouration from the wet substrate and not scale rot.