Ok I’m back. I have been watching a little more closely and still have a slow drip into the tray. I have started running with service boiler off until required which has slowed the rate of drip tray filling. On start up the drip rate is steady & this is the drip I was seeing after pulling my shot & thinking hey this isn’t right. I did measure the start up drip to be 25ml. If I leave the machine idle there is no dripping.
When the service boiler is on & up to temp I get the slow drip. Much slower than the expansion valve drips, but this is what was filling the drip tray up with the machine on for a few hours. After pulling a shot & starting to steam the milk it is a steady drip that stops once finished, but continues to drip slowly after a little while.
So this points to the vacuum breaker right?
What if I have cleaned it without any change?
What if I have replaced it without any change?