I get this issue frequently in Daz.

I normally just reduce the glossy setting is there is one, or the specular strength. If those two don't work I often try changing the lighting model down near the bottom of the list, to matte.

Usually it doesn't seem to require too much tweaking.

And when all else fails and I don't have time to figure it out, I fix it in post with the clone tool in GIMP.

 

Amy