It's my understanding that PRE shed cycle soaks are beneficial (I have to assume the snake knows when timing is right), while forcing the snake to soak after it has begun the shed cycle might rob the oils that form during the shed cycle between the skin layers. I've never had a snake pre-soak after they turn opaque. I suspect what we see during the blue phase is the oil forming and loosening/separating the skin layers.
Regardless, safe to assume that if your temps are correct then you should monitor for mites and shedding coming up. Since you've only had the snake 6 weeks, I'm thinking it's a shed and you're just getting used to the way the behavior changes around that time.