We got the great solving the way from our customer ,she sent email to us:
Hello!! I just wanted to tell you I was experiencing dryness and tangling with some of the wigs for a while now but I know you always send the best hair quality so I knew it couldn’t be the hair.
Now I started washing them in gallon jugs of spring water or distilled water instead of the tap water and I am happy to say that there is no more dryness or tangling The water we have here is very bad and filled with chlorine and chemicals. I will never go back to using tap water again!! The wigs are soft and tangle free and look like new again.
If anyone tells you they are experiencing tangling or dryness with the hair it could be the water!