I've notice my 1.5 Fuel ultra light air bottle losing its fill the last six months. It was due it's first test at the end of April 2017. So today after filling it I put some water over the reg and bottle and had a fizzing of water in the picture as marked. Just wondering if anyone has a fuel bottle that's having the same problem. If so please check. , I have now removed the reg and bottle grip and have had my local site destroy the bottle for me.