The first cup from a new machine is almost never the best one. Not because the machine is faulty, but because there are three or four things worth doing first that no manual explains. Ten minutes spent setting up properly saves you the day-one disappointment.
First of all: run a cycle of water alone
Before your first coffee, run a full tank of water through it with no coffee. Pour it away.
Every new appliance leaves the factory with residue: machining dust, traces of assembly oils, that new-plastic smell from the seals. None of it is dangerous, but it flattens the taste of the first cup. An empty cycle flushes it out.
If the machine has sat in a warehouse for months or come off a long shipment, do it twice.
Preheating is not optional
This is the most common mistake and the one you notice most.
When hot water enters a cold body, it cools on the way. You can have the water leaving the heater at exactly the right temperature and have it reach the coffee ten degrees colder. The result is the same as a low-temperature extraction: a short, sour cup with no body.
Preheating simply means running hot water through the circuit before you load the coffee. It is what a barista does when they flush the group before starting, and it is the difference between a decent cup and a good one.
In genuine cold — a van in January, a campsite — preheating stops being a refinement and becomes necessary.
Water: half of your cup
Coffee is roughly 98 % water. If yours tastes of chlorine, your coffee will taste of chlorine.
- Very hard water (high in limescale): flattens the nuances and forces you to descale constantly.
- Distilled or pure reverse-osmosis water: not the answer either. With no minerals there is nothing to carry the flavour and the cup tastes empty. Water that is too soft is also harder on metal parts.
- The sweet spot: low-mineral bottled water, filtered water, or tap water if yours is reasonable.
If you do not want to think about it: a bottle of low-mineral water, the cheap kind. Brew the same coffee with your usual water and with that, on the same day. The difference is surprising.
The five day-one mistakes
1. Filling the basket to the brim
More coffee is not more flavour. If the basket is overfilled, the water finds no way through, pressure spikes, and you get a bitter jet or nothing at all. Every basket has its dose; respect it.
2. Using filter-ground coffee
Supermarket pre-ground is usually medium, meant for drip machines. In a pressure machine that size lets water through far too fast and you get dirty water. You need a fine, espresso grind.
3. Judging the machine on the first cup
Between the cleaning cycle, the preheat and finding your grind, it takes three or four cups before you have an opinion worth having. The first one does not count.
4. Not drying it before storing
Putting it away closed and damp is the fastest route to a strange smell within a week. Open and dry.
5. Charging it full and leaving it for months
If you are not going to use it for a while, do not leave it at 100 % in a drawer. Lithium batteries keep better at half charge.
What a good cup looks like
So you know whether you are on the right track:
- The coffee starts flowing after a few seconds, not all at once.
- It comes out as a steady, continuous stream, not in spurts or drips.
- There is a hazelnut-coloured layer of crema on top.
- It does not leave your mouth dry or rough.
If it shoots out thin and watery, grind finer. If it drips or chokes, grind coarser or use less coffee. That is essentially the only control you have, and it is enough.
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