Yesterday I changed my 16 week old onto the Hipp Comfort milk on advice of the doctor & Hipp nutritionist, and in all the bottles I've fed there is a mouldy looking residue within about 20 minutes of it being made... is this normal?! I've cleaned & re-sterilised all my bottles and make up the feed as per the instructions. I'm waiting for Hipp to get back to me as tweeted them a picture, they said a manager would contact me which makes me think perhaps it's not normal!!!