Hi guys,
I am sorry to say this but I started getting the occasional “pssst” with clear water shooting out from the back part of the portafilter again.
The new silicone ring has been working great and it also seems that coffee residue doesn’t stick to this ring as much as the previous one did, so its almost always very clean, but the leaking still happens once in a while regardless of how I lock it.
I am using under 17g which does not leave any marks on the puck so I did not reduce the dosage any furtgher.
I am wondering if the pressure, which is a little high, could be the other culprit?
Thanks!