Cut the corn plant back, 4-6" above the soil-line. They always grow leggy and cutting back is the only way to have a good looking , smaller plant. I had a huge peace lily, about 36" wide and 3 years old, with dozens of blooms in the spring/summer. It stayed outside during the spring, summer and early fall months, and that's perhaps why it always has bloomed so well. Our unusual early cold took it away. I have now lost several dozen jade and several dozen aloe vera (some really large ones), numerous schefflera and rubber trees. I simply did not have room for them inside. Oh well, less mouths to feed in the spring.