As they saying goes, you learn something new everyday. Here I was thinking I'd done the most I could to care for my wig by washing and conditioning it weekly and keeping it brushed every day, etc. But because it is synthetic the heat from the back of my neck and even the friction from rubbing on my clothing has made the ends frizz a bit. I hadn't realised that was the cause but apparently so. And apparently steaming a synthetic wig is the best way to deal with that. This is great but also a bummer - great because it will breathe new life and silken softness back into it... and a bummer because it's yet another thing to skill up on and add to the "routine". Plus I need to get a steamer! Oh well.
Just sharing for those who might wear wigs and not be aware of this particular care tip.