I don't really know an 'easy' way, but I can tell you what I do.

I have the hose clamp positioned so that the screw/hex fitting points straight up along the firewall. I bring my trouble light and a long flathead driver and climb up into the engine compartment, first standing on the battery and then putting my knee on top of the head. So I'm basically sitting on top of the engine when I do this.

I think it /may/ be easier to undo the clamp from underneath in the FWD models, but there's not much room in the AWD like mine (and yours) and this is what has worked for me. Open to suggestions.

When I cleaned my PTC I ended up pulling the whole plastic fitting right out of the plastic intake pipe you're removing from the turbo. When I put it back together I sealed it up with sensor safe silicone and haven't had any problems. It's actually not a very good fit anyway so the silicone was probably an improvement. Also it's not so sticky that I'll never get it off again (like if I used ABS cement or epoxy or something like that).

Now with all that said, you can easily clean the PTC from above without removing either the PTC from the intake hose or the intake hose from the turbo. If you remove all the hoses from the PTC you can just insert you cleaner of choice (do they make really stiff pipe cleaners?) and spray throttle body cleaner down there and get it really clean while it's on the car. This is what I will do next time I decided it's necessary.

--
1998 V70 AWD->FWD Turbo 200k+