Ok, I'm looking very closely at my tray of tomatoes, all different kinds, and the leaves of most of them have tiny raised areas where the leaf hairs are growing and they look dark/black. Of course I first think disease, but these leaves have literally never been touched. No splashes, no water, no breeze of air, nothing. The seeds were all different, sealed packages, and the medium they are in is clean seed starter. I did touch one leaf to see if it was just dusty, and it kinda looks like I smooshed some tiny white hairs growing on the leaf from the spots.
So, is it normal or a disease? Do I dump the whole tray and start over? If so, is hot water and soap sufficient for the tray? How would everything get it with no breeze or water? Maybe it is just normal for the fine hairs on plants utterly undisturbed?