Aglaonema Help

[Mayesc1]

I have two leaves on my Chinese Evergreen that look like this. I was thinking it was turning yellow as it was an old leaf or the start to a watering issue. But it has looked like this for about a month. I think it is cure so have not cut it off. Anyone have any thoughts?

 

[Sabina515]

My agleanemas do this with improper watering. I am horrible at watering my indoor plants since I've had a baby. Now that the nice weather is here I out all my time and energy outside. Cut the leaf off, let the plant out the energy into healthy leaves.