How often do you water and what kind of pots are they in?

I've done both over and underwatering. I also think yours need more water.
I have been watering mine every 4-5 days. They are in different types of plastic pots and 2 different mixes.
I know tags and most of what I read says they like low light. I know brightness varies. For me, mine are happy by the window receiving bright light and a little bit of direct sun in the evening as it sets. Cutting back on light can be good when a plant needs to adjust or is in recovery.