I tried to put some conditioner in my Pinkie's hair to help it unfrizz, but it didn't work super well. I think it might be because of her curly hair. I got some of her head (mostly ears) wet in the process, and she's fine.
I ended up cutting the lower (blue and purple) part of Dash's mane because it's more accurate/looks nicer, and it was tangled. For some reason, that lower part tangled a lot compared to the rest of it.