My DS2 who is 20months sounds exactly the same & his daddy it too telling me to get it cut because of this. When he wakes up in the morning it's all tangled and frizzy LOL.

I use a leave in conditioner, or some of the detangler spray stuff....he loves me spraying it in crazy little man. I actually use it for both my boys, makes brushing soooo much easier and it looks heaps better. I also use one of those little heaxagon brushes (have no idea if you know what I mean), I got mine from the kids hairdresser, it's gentle easy to use & they use it themselves too.