Selkotanswered grow question 5h ago hey 👋
spots are caused either by mites or early powdery mildew
If you see tiny moving dots under the leaves or fine webs, these are mites: treat with black soap + neem oil every 3 days and increase humidity (nevertheless avoid excessive humidity!)
If the surface appears to be covered with a fine white powder, it is powdery mildew: remove the affected leaves and spray with a mixture of water and baking soda (10%)
PS: Improve ventilation to prevent recurrence 👍😕