I recently switched from a Bialetti Moka Express 3-cup stovetop espresso maker to a Cloer 5928 espresso maker. It has an integrated heating unit, just like an electric kettle, so making a coffee is now much more energy-efficient.
The coffee from the Bialetti was flawless (using a medium-fine grind of Starbucks espresso roast beans). Now I have a difficult time producing coffee that is not both overly thin (underextracted) and has an odd taste that I can't even describe (perhaps from overheating the ground coffee?).
The new espresso maker takes some time to heat up (365 Watts of electric power), and then the coffee is pressed through relatively quickly in short bursts.
Having a look at the funnel, it has a hole, unlike the funnel of the Bialetti. My questions are:
- Can the hole in the funnel have anything to do with the underextracted coffee?
- What could be the purpose of the hole anyway?