My Nappy Nippas work beautifully on cotton terries and Bumbles, but are hopeless on bamboo (Bambinex and Bambeasy). Every time I remove the wrap the Nippa has come off. One of these days it's going to dig in and hurt ds. Does anyone else have this problem? Is there anything I can do about it? I don't think I could get a safety pin through the layers of a Bambeasy.