My hair is thick like quest for the perfect Curl, but it is super coily in the back. I usually get tangles for one of three reasons:
(1) I didn't get product on all of my strands. Sectioning is key. I'm a lazy natural, so i typically use 4 to 6 sections and rake through enough product to give me good coverage. I don't shingle, but I do rake thoroughly.
(2) I used the wrong type of product. I need a Leave-in with good conditioning agents, like oyin hair Dew, koils by nature Coco-Aloe, or Curl Junkie Smoothing Lotion. I need a gel with good slip to spread easy but with enough hold to freeze my curls, like Uncle Funky's Daughter Curly Magic, kinky curly curling Custard or as I am Smoothing gel. I can't use ecostyler because it doesn't spread for me and takes too long to dry.
(3) I waited too long in between washes to detangle. My shed hair can cause a lot of problems and my hair will start to lock if I leave it too long. Optimally, I'd wash and detangle twice a week, but I can get away with once a week. If I wait two weeks, there are usually a couple large knots to work through.