DD has recently "graduated" from next-to-me to full-size wooden crib. Overall it's been great but there's just one issue. When lying on her back DD has a way of wriggling that pushes her backwards, so if you put her down at the foot of the crib she will wriggle her way up until her head is pressed against the other end, and then keep pushing. It isn't deliberate, just a consequence of how she kicks her feet. This wasn't a problem in the next-to-me as the end was soft padding, but now in the full crib she's basically banging her head against solid wood (the head and foot panels are not slatted). I can actually hear little knocking sounds :(
I really don't think there's any stopping her wriggling that way so I need a way to cushion the blow. I am tempted to take her old Moses basket mattress and slot it behind the crib mattress, holding it in place by pushing it between the side bars. DH is unsure though as he's afraid of it falling on her and also he points out that crib bumpers are a SIDS risk. I really don't think it would fall but concede he's right about the advice. However both her next-to-me and Moses basket had padded head ends and I don't understand how this would be different.
Thoughts / advice?