I have just kegged my first beer today having got sick of bottling! I kegged into a9.5 L Corny. I bought a new gas regulator which is Attached to a SodaStream. Bottle. I set pressure at 20 psi last night when I looked this morning it had dropped to 12 psi. Does this mean that my system is leaking or my regulator isn’t working properly.I did check it with Starsan. would I normally expect to see the pressure dropping.