Baby oil is essentially mineral oil with fragrance. And while I'm personally not a fan of it in my hair, there are a number of curly, coily and kinky girls who swear by products containing mineral oil. Here's a Naturally Curly article extolling the virtues of mineral oil. My advice would be to experiment with a little as seal once you've moisturized your hair, and see how your curls respond. Be sure and wash with a clarifying shampoo afterwards.