I have inherited an older style nappy wrapper, not the newer tommee tippee one, but the white one. I know with the tommee tippee one it's simply a case of opening the lid, popping the nappy in the hole and twisting. This older style one has a sheet of clear plastic covering the hole. I have to remove the whole twisty thing, put the nappy in and replace the twisty thing - or am I missing something?? Please can someone enlighten me?