I've only just started working with the hair on mine a little bit. I thought by getting the hair wet, it would "soften" the gel, and allow me to work the hair a bit. Right now it's a bit more 'triangular' shaped, some of the photos people have shared show the hair hanging straight down.
Just dipping my fingertips in some water and trying to loosen/soften up the hair, to move it around a bit, I can see that's not the way to go about it. It's loosening the hair allright, but it's starting to create 'flyaways'. So, I think the InArt video is accurate when it says dip the brush in some hair gel. I think that way it should wet the hair a bit, and still allow you to position it. Just straight water on the hair is probably not the way to go about it.
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The overhead lighting isn't doing the giant forehead any favors. I've been trying to grab just a single strand of hair to bring it in over his face, but it keeps getting stuck with multiple other clumps.