If your Ball Python is soaking a lot, you should consider it mites until proven otherwise. Pull her out of her enclosure and put her in a temporary tub on white paper towels (makes it much easier to spot mites). Pull out the water dish that she's been soaking in and evaluate for mites sitting at the bottom of the water. If the water dish that she's been soaking in is a dark color, making it too difficult to tell, pour the water into a clear glass and set it on a white paper towel. Evaluate her current enclosure for evidence of mites. If, on first inspection, as detailed above, you don't see evidence of mites, keep her in the temporary bin on paper towels with a clear water dish, and watch for several days to see if she continues to soak or if mites show up in her temporary tub. Hopefully you won't find any.

Also, many paper towels have a small dark flecks in the material itself which can be confused with dead mites. If you're uncertain if a speck represents a dead mite, take a toothpick and very gently try to push it to the side. If it moves, it may be a dead mite. Live mites move, so are less difficult to diagnose, but they do move pretty slowly, so you may need to watch patiently for a few secs before trying the toothpick thing.