I typically only see my BPs soak when they're shedding, and whenever I get new snakes I quarantine them for about 3 days before putting them with the others.
I've recently within the last 3 weeks purchased 5 new BPs, all of which I got from people who were reputable breeders.
Slowly, one by one I've noticed my BPs soaking, I was a tad concerned but as I was about to go to bed just now, I was checking on my snakes and I noticed my adult normal male I've had since I was twelve (6 years) soaking, and he NEVER soaks.

My mind screamed
"MITES!!"

I don't see anything on any of them, their temps are just fine. But I honestly have no idea what to look for when it comes to mites.