For her naps, I have been going in at the 30 min. mark. But - now that I read your post again, if she's waking up after 45 minutes, should I then be stirring her at the 15 min mark - 30 min before she wakes?
Unfortunately, on two occasions, I did wake her up, but she was able to go back to sleep. This is only the third day so I'll continue to try it. I am also doing it at night 3 times. So, I'm pretty tired b/c she gets up another 3 out of habit. I'm confident that she's not hungry because I do nurse her at 2 or 3 a.m., after the DF at 10 p.m.