I can’t figure out my dieffenbachia. I was watering about once per week and her edges were dry and brown. I tried watering a little more frequently and then she started turning yellow and lost quite a few leaves. I live in Arizona so probably not enough humidity. Does anyone know how to take care of this plant? If so, what’s your schedule? Trying to save her before it’s too late. (She looks okay in the picture but she used to be very full as you can see in the other photo)