Silicone spray lubricant found at most automotive stores. Be careful to only buy silicone sprays that will not leave any greasy or other unwanted smell or residue on the wig. In my case here in Canada I had a can of MOTOMASTER brand spray, available at Canadian Tire. I gave it a try on one of my more tangled up wigs that I wanted to save as I enjoy wearing it. A few light sprays from a good distance to mist and to cover the areas where the tangles are notable and then a gentle brushing out of the wig and TA DA it worked and works to help keep the wig from tangling back when worn. This spray left no sticky residue and no smell, but dried on the hair fibres to help keep them from tangling back up.
If you are not sure try it on a troubled or badly tangled up wig that you are willing to give it a shot over and see for you own results.
This can of MOTOMASTER SPRAY SILICONE LUBRICANT only contains the following.
Petroleum distillates, heptane, isobutane and propane. So I assume to look for similar contents on any other brands you may see or find.
A light misting dries up quickly and brushes out the hair easily .
Take care all.