Hi it may be that you have a bad batch as you say, but I found that Stomahesive paste worked best for me.I just put it around the flange of my bag nearest the hole cut out for my stoma.with the paste I had hardly any leaks and my skin around my stoma improved also.if you haven't tried it give its go and see if it helps!!.I know you posted a couple of months ago but I've only just seen it !!.