1.Go to the SET EDGE COLOR ICON(CTRL + E)
2.Lower the threshold of the folds(bottom right of pop up)
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Every model is diffrent as to how low a threshold it can have and still be build-able, so i suggest you lower it then go back with the DIVIDE/CONNECT tool to add strength to important areas(Cut and Glue areas) as well as fix the symmetry.
*Remember, the more folds you take away, the lower the overall strength of the model is*
So now you know, and knowing is half the battle....