I could use some advice please. I’ve just started developing film at home after a 45 year hiatus. I’m routinely getting silver looking roundish spots on my negatives (blueish in color after scanning and inverting in post) and I don’t understand why. See red arrows in the following image. I don’t think they are water spots as I’m using photo flo in my developing sequence (D76, Ilfostop, Kodafix, followed by lengthy water wash - distilled water). I wonder if these are silver flake residue that didn’t come off during the developing process. I’d appreciate feedback and suggestions for how to prevent this from happening in the future. I've seen these spots on Holga 400, Fomapan 400, and Kentmere 400. I'm using a Olympus PEN EE3 and Spotmatic SPF camera. Many thanks.