Plant life

Very much a sit at your desk work day today, but managed to finish something which had been hanging over my head for a while now. In between spells at the desk I was trying to focus on some domestic issues, one of which is trying to get our indoor plants to thrive, which is not really happening currently. This Peace Lily in particular never seems to look healthy. I have tried various strategies around watering and feeding it but it continues to look sad.