I had the same problem so I no how you feel
The best stuff in the world to use is either no-nots or top tails shine
All you do is spray it in with the no nots(its like a conditioner) and with the top tails you just rub it through.my preference is the top tails because it make it so easy to brush so try it !! Just see what happens
Even just smoother it in conditioner and leave it for a little while.
That's all I can say or suggest so happy brushing!