I recently bought a small Philodendron xanadu . It was fine when I bought it but after a couple of weeks, a lot of its leaves are getting too much moisture in them (if I touch them they disintegrate). At the same time, some leaves are turning brown at the tips. I live in a tropical climate with a lot of humidity and the pant is in a covered terrace with good indirect light. I have another older xanadu that is doing great, but the stems are getting longer and longer, which is a sign of not enough light... however, if I move it closer to the light, the leaves start turning yellow.... Any advice? (I am more concerned about the smaller xanadu, I water it only when the top part of the soil has dried out yet it seems like it is being overwatered.... Thanks!!!