NatureScapes.net Forums

  The attached image of the sensor reveals dust that resembles uniformly tiny elongated fibers randomly scattered across the full sensor, approximately 20 total. I was stunned!  Normal dust spots are generally circular and smaller. Has anyone encountered anything similar on a Sony a7RIII?
   Camera use has been very limited in recent months like everyone else. Lens changes, the few occurring, are always undertaken indoors (temperature and humidity controlled home) before going outside. Changeovers always done quickly; the body never facing upward. Camera, about 1.5 years old has never been dropped or abused.
   I casually snapped a few "sky shots" recently after doing flower macro work; expected a spotless sensor (last cleaned in the late fall), was stunned at particles present: size, shape and quantity. (Image purposely tweaked in LightRoom to dramatically reveal spots, otherwise invisible peering at the sensor under a strong cross light). Spots are invisible on 4K big-screen images.
   Sensor is now clean, virtually spotless. Used a vacuum cleaner held at the lens-mount plate, theoretically pulling out random dust that might be residing within the sensor box (instead of blowing, driving dust further back into other optical or mechanical parts). Followed up with "Dust-Aid Platinum cured silicone (stamp) cleaner" (a rather flimsy "stamping" device that works surprisingly well, allegedly made specific for Sony sensors).
   The size, shape and in particular quantity of dust spots discovered was unnerving.

Sounds like lint that always is floating around indoors, but hard to say. At least if it was easy to remove, it doesn’t sound like fungus. 
Normally to upload an image, click on the “upload an image” icon, select an image(appropriately sized) and hit “upload file” below the box. Sounds like that may have been what you tried, though.

Joe

I sure hope you locked the sensor in place before you did all that via the menu sensor cleaning option which after shaking the sensor locks it in place until you power the camera up again. If you didn't you likely damaged the IBIS mount which is plastic.