I am fortunate enough to have these beauties that I snagged in a hidden lot years ago, but their hair was played with by the previous owner and it's frizzy and dry on the ends. Because they're valuable and lovely otherwise, I'm scared to do anything drastic or untrustworthy to fix the problem, but they'd look so much better if I could smooth their hair.
What are your reliable, proven hair-fixing tips that are least likely to cause harm to these girls? What should or shouldn't I do to fix them?