One of the hazards of having the camera on while handling fishies - a bit of splash gets on the lens occasionally. I never notice until I get home and put the pix on the computer. Usually I do remember to clean the lens before the next outing. Usually.
P.S. A couple of the "lovely spots" are new ones that are somewhat further downstream than I had previously explored. One of them was a real surprise when I noticed it, and a real delight to fish. I'll be going back to that one, for sure.
The fish are always right.