@ysmina-- I don't think that's a good idea, even if the wig is made of real human hair. Wigs need gentle cleansing. Washing a wig as you would your own hair will wear it out and cause hairs to fall out.
Wig conditioners are usually spray leave-in conditioners that do not require washing. This extends the life of the wig while keeping it soft and shiny. I personally use an aerosol spray wig conditioner. I use it after several wears to help brush out the tangles and return some shine o the wig. This type of conditioner is also great for frizz and actually makes a wig look more real like.
Some people try to make their own spray conditioner by mixing regular hair conditioner and water in a spray bottle. I don't recommend that either because regular conditioner will leave a lot o residue in the wig that will be difficult to clean later.