Hello One and All- I have an Andrja Premium. I do regular plainwater backflushes and I do cleaner backflushes. The machine makes 2 to 6 shots a day. I have used it for about 2 1/2 years now. The brew pressure gauge started doing crazy fluctions while making a shot of espresso. Now it does nothing while making a shot. I have seen it with pressure on it after the machine has been on for awhile but not used. I have seen it read some pressure if the machine is on long after a shot is done. I moved to Florida about 2 years ago and was using filtered tap water, for about a year. I realized after research that was not good because the water here is so hard. I now use only RO water. Does anyone know what may be cause my brew gauge not to be working? I do know how to pop off the shell of machine...any help on diagnosing the problem would be greatly appreciated. Thanks, H.L. PS- I have learned much from reading the posts on this list... Find a local pizza place, movie theater, and more….then map the best route!