I inherited this ivy plant, and it doesn't seem to be doing well. He was pretty bare when I got him, but is still loosing leaves here and there. I have only been watering when the top inch or so of the soil has dried out, and he is in a pot with drainage. He lives in my bathroom, which has a skylight and gets a lot of light throughout the day. Any ideas to help him stop loosing leaves and bulk up a bit?