100 percent add more plants
Also its not the best to tong feed
Veiled's don't really need high humidity 30-50% in the day, at night And like 70-100 at night
Also I would not give her reti calcium every feeding
Its good that he is eating from the cup, I think he just needs time to get used to eating out of the cup. Sorry if this does not help. Note I would not be worried about this unless he continues not to eat out of the cup.