Bake your log at 200 degrees in the oven for a couple of hours. It will kill mites and mite eggs. I'd also do whatever I could to brush off loose debri so that in the future you won't wonder "Is it mites or is my log shedding".
At petsmart they have a few mite treatment products, no P.A.M. but if you don't have time to wait I've been told that reptile relief on the snake works great, just that pam is perfect for the enclosure. I couldn't find reptile relief and just used pam. So far so good, but I have two snakes in shed, so I can't treat their enclosure with pam.
Good luck.