as far as i know, only ever spray with carb cleaner, never touch the parts within, they are brittle usually, as they work with a heated element, this is cooled by the air flow, and the amps used to keep a constant temp is measured to calculate the air intake or something like that, they are fragile by nature, someone on here got a new non vx maf for about 40 sobs iirc. Genuine 150 ish! Personally, i would not worry about spraying with carb cleaner, if its so fragile as to break under those circumstances maybe its in need of replacement anyway it seems to me.
And anyway, whats the alternative, er, by a new one? Provided your diagnosis is going in the right direction of course. As you say, the crank sensor is known to through other codes including maf before it fails or gives a specific c sensor code. With that in mind, i wonder if you would consider changeing the sensor anyway and see if that cures it. If not you have a spare, or at least you can avert a very common failure.
General opinion is Maf failures are rare on the omega. But recent fuel trim codes look as though they may be down to a miss reading Maf sensor. I would encourage a few more opinions from more experienced members before proceeding. Hope that helps, ish?