Use high quality coffee beans to get the best out of your machine.
You should also make sure you change the coffee machine filter whenever required for best results for a more neutral taste that won’t affect the taste of the coffee.
Use the golden cup ratio of coffee to water, which is about 55 grams of ground per one liter of water, or about 1 unit of coffee for about 18 units of water.
Use a brewing temperature of between 195-200 degrees Fahrenheit.
If your coffee tastes bitter, it may be over-extracted, or ground too fine. On the other hand, if your coffee tastes flat, it may be under-extracted, meaning your grind is too coarse.
Finally, there is no need to fill the hopper, as coffee beans will sit there for days and lose their freshness. Better keep them in a sealed package!