We've pretty much got a good latch (after reading lots of books and getting support from midwives and the breastfeeding clinic at the hospital). But at night, when my two week old wakes up she always seems too sleepy to open her mouth wide enough to get a good latch. It's the only time she ever seems to have a problem with it. Right now I'm taking her off every time she just takes the nipple and I try to get her back on properly. But after a while she just gets agitated that she's hungry and not getting anything and starts to winge which makes it even more difficult! I should say she's pretty difficult to rouse in general. If she wants to be asleep, nothing in the world will wake her. So suggestions to blow on her face and tickle her feet to wake her further unfortunately won't work :(