Half butter, half lard is my go-to.

Did you try looking up a photo of the Apollo 11 landing site taken recently by the LRO orbiter? The ground really is that uneven and cratered, which would mess with shadows the same way a sloped driveway does at sunset. Seeing those real surface pics side by side with the 1969 footage made the official explanation click for me.

Blame the tool not yourself - it probably worked fine but you skipped reading the manual.

Read somewhere that it can reduce the salt content.

Right, but you know what I mean - when a plane's AOG you're hunting down whatever part will get it back in the air lol. But yeah going digital was the best thing I did. I used to carry around those little flip notebooks and would always end up with coffee stains or grease marks on the critical pages. Now I just snap a photo of the part tag and type in the serial number, boom its searchable forever. Plus no more trying to decode my own handwriting from 3 AM service calls, which was getting embarrassing honestly.