I experienced the same difficulty when bottling, trying to find the 'sweet spot' for the filling wand to stay on top of the punt. But now that I use the All-In-One Pump vacuum unit , it is no longer an issue....big punts...medium punts...no punts... the vacuum fills them all, and in just a matter of 10 seconds or so. AND....no over-fills. I highly recommend trying the All-In-One pump setuip , if you can.I find the deep punts a pain to fill with my bottling wand attached to my spigot. I've been recycling them lately.