Sick corn plant
I received this corn plant as a house warming gift 6 months ago. I watered it very, very rarely (like once a month) for the first 3-4 months but then it started looking a little droopy so I started it watering it every 2 weeks recently (about 3-4 cups each time). The smallest "stalk" looks really bad but I don't know what to do. Now I'm afraid the other stalks are going in that direction. The color of their leaves are turning lighter and the leaves are curling in and drooping.
I live in Taipei so when no one's home, the apartment can get very warm and muggy but when we're in, the A/C is always on. Would these conditions affect the plant's health?
I haven't had much success in the past with houseplants so my confidence in my abilities is pretty low. Any and all suggestions are very much appreciated!!!