It has been suggested...

If you start to have problems with your system tangling, here are a few things that can be done to preserve the life of your unit. By detangling your hair the wrong way, you may inadvertently be diminishing the condition and life span of your unit. Always sleep with your hair tied up in a satin scarf, cap, or sleep on a satin pillow case to reduce friction on the hair caused be cotton pillow cases. This will greatly reduce tangles, and breakage. Before getting into the shower, wet your head and brush all the hair toward the same direction, using a wide tooth comb or vent brush, making sure to support your attachment when brushing or combing your hair. (NEVER SLEEP WITH YOUR HAIR WET!!!) Use a shampoo and conditioner made for dry hair. Gently shampoo the hair in one direction only and follow with conditioner in the same manner. If your unit is extremely matted, you may need to perform the

PLEASE, PROCEED WITH CAUTION, If this process is done incorrectly, it can damage your unit. This process is frequently used by professionals for detangling of human hair systems. Although it is a relatively simple process, if executed improperly, may result in permanent damage to your hair system.

You will need the following: -

Large sink with  gallon of very hot water ( as hot as you can stand it) -
1/4 cupClorox bleach ( brand only. DO NOT USE GENERIC) -
1/4 cup ammonia - and warm water
Wide tooth comb or vent brush
Shampoo
Conditioner
Instructions:

BLEACH TIP TO DETANGLE YOUR UNIT  (This information is courtesy of Black Hair Media.  Visit their website for additional information on issues that you may seek answers to.)
1. Mix one gallon of very hot water (hottest available from the tap) with 1/4 cup of Clorox bleach. (Do not use old Clorox or a generic brand, it won’t work)

2. Totally submerge the human hair unit into the water for approximately 2 or 3 minutes.Do not leave longer than 3 minutes Small bubbles will normally appear durring the process. Comb or brush very gently when submerged.

3. Remove hair unit and submerge in a basin of luke warm water that has been pre mixed with shampoo. Gently lift in and out for about 3 minutes and also brush or comb the hair very gently when submerged. Remove and blot dry

4. Mix 1/4 cup of ammonia to 3 cups of warm water. Dip hair unit in and out twice.

5. Repeat step 3

6.Apply conditioner, rinse and style.

Your wig will look brand new and be tangle free

So is the bleach method not to be used that often because it will eventually change the hair color, also you can saturate the unit with nexxus or a deep conditioner on the unit place in a plastic bag, nuke in the microwave for 30 seconds, and then put back in again for another 15 seconds.