Curly fine hair problems!

Amber

Help please! My daughter has my very fine blonde hair, but her grandmas curls. My hair tangles very easily but hers is so bad she gets HUGE knots over night, that kill her when I brush it. I do use a conditioning spray on her hair which seems to help, and I have a detangler for her. Both still used make it hard to brush her hair, even after just having her lay down for an hour for a nap. I'm constantly brushing to avoid pain for her, and I'd really rather not cut it. Any product recommendations to help her hair not tangle as easily? Should I be using an actual shampoo and conditioner now? She's just over a year and a half, and has sensitive skin! No coconut can be used on her skin! Second picture is how her hair looks after brushing it and getting all knots out!