I recently picked up a used VBM Domobar Piccolo and have been putting it through its paces. The previous owner did a chemical flush prior to packing & shipping the unit, however each time I've run the hot water to re-fill the boiler, I get the following dirt/debris in the bottom of the cup:

It doesn't look like coffee grinds - it's a mix of dark and white flecks. What's this likely to be?
It doesn't look like coffee grinds - it's a mix of dark and white flecks. What's this likely to be?
Comment