The first week or two with my VBM DS was quite frustrating as well. I still dont know why, but it seemed that things just sort of suddenly worked themselves out. It was almost as f t-something was in the water messing up the steaming until the boiler got cleaned out. It was odd.
My suggestions are these:
- Do not force he air. Just a little bit at the beginning and that is all you will need.
- Things happen in a HURRY! For a standard double you will have maybe fifteen seconds at the most to do what needs to be done in the jug.
- use a thermometer and do not steam past about 50C. (120-125F.). Adjust from there. The temperature will rise another 5C or so after you stop.
- Change milk. Sometimes the feed given to the herd changes and it messes up the quality of the proteins and farts or such, and it affects the ability of the milk to stretch.
And if you think milk is tough, try soymilk!