I understand you aren't supposed to use cot bumpers due to SIDS risk. However, dd has just moved from Moses basket into a crib - she is really wriggly and keeps ending up wedging her head against the end or side of the crib and then banging it on the bars when she next wriggles. So if I can't use cot bumpers then how on earth can I stop her doing it?! Any ideas?!