I wouldn't spray on the leaves unless it was lights out time. That invites light burn.... with a pressure sprayer...
She is overwatered. You are watering too often. Let it dry out in between waterings. Lift the bucket if it is even a little bit heavy don't water it wait till that bucket is lightDon’t think it’s overwatering but could be wrong. Seems to be mostly in the new growth but tell me what you think, water every couple days but might not water enough only about a litre or less with a pressure sprayer. I’m guessing that’s not enough?