Problem with geranium cuttings

[SilverHawk]

Could I ask you kind MN gardeners what's gone wrong?
I took the cuttings and popped them in jam jars on the windowsill. They are all growing roots very nicely but :( something is eating the leaves and I have lots of little black dots on the underside of the leaves (eggs?). I can't see what's doing it. WWYD?

black dots poss.bacteria caused by being too moist need to destroy leaves! spreads easily so don't let leaves with dots on touch soil or fresh leaves

Thank you. I hadn't thought about mould/bacteria but it could be. The dots are in clusters though.

I usually let the cut stem of my geranium cuttings dry off then root in well-drained compost. Perhaps yours don't like having their feet wet!