I recently acquired a used A7r which is in need of a sensor wet clean. There's a few large spots that the camera shake and indeed a blower can't remove. I'm aware that the shake mechanism of the camera needs locking down and how to do it. I'm also fairly comfortable with wet cleaning sensors as I've been doing this for some years on both Canon and Leica cameras ( without doing any damage).
What I can't seem to establish is the swabs and fluid that are considered safe. I've always used isopropyl 70% with Invisible Dust orange swabs and wonder if anyone can advise from experience what they use.
Thanks
p.s. No Sony outlet within miles from my home.