Poor little grocery mini not taking off
I saved a grocery mini (I assume it's one of the Parade types) from being tossed and brought it home. It had no flowers, and all the leaves dropped off from not having been watered. The canes of the 4 plants were green. I put it in a window and kept it moist. Three of the 4 canes are still green, and 2 of them are putting out new leaves. The leaves have what appears to be slightly lighter green dust on some of them. Is this the sign of a pest? If so, what can I do to save this poor little guy and make it thrive?