Sharry Baby Tri Colors - Yellowing leaves

[Leslie2934]

Hi all, I had a question about my sharry baby. I noticed this morning while checking my plants that she has some yellowing on 3 leaves. She is in spike with 3 spikes. The yellowed areas look dry. Could I not be watering enough? Currently I'm watering once a week, unless she feels dry and fertilizing once a week, although this is my week to wash the water through so no fertilizer today. I would appreciate your opinions. And also if I do lose these 3 leaves, do I cut them off? Or will they fall off by themselves? Thanks!