yes, my biggest plant (picture below) has a couple fan leaves with some spots...i've had this plant for 7 weeks (yes i know it's small, started out first 5 weeks with just window light) and it's never had these before the other day. i removed once set of fan leaves already cause they were bad, i don't see how they can be light burn, they aren't even close to the light, and it only gets between 75-78 degrees, idk the humidity, but can those happen with little humidity? If so, what's the best way to increase it? just spraying? doesn't that also cause spots if they dry on the leaves? or the bowl of water trick? anything will help thanks!