Photos won’t convince people like that because they’ll just think it’s all fake. I suspect even if we all pitched in to buy them a trip into space, they still would think it was all fake – screens instead of windows, like an amusement park virtual reality ride.
+1 for alcohol. I have a small smartwatch and I clean it with a tissue and alcohol. I use a toothpick to poke the damp tissue into any crevices, and also into each hole in the band. It’s gross how much dirt and grime gets stuck in those holes.