I want to understand how I can make a better cup of coffee, so I recently purchased a Wilfa Grinder. However after reading the instruction manual it says that the 'blades' and bean cup cannot be submerged in water, only wiped clean. This means that you're never really going to get it spotlessly clean like you can with a manual grinder.
So my question is which of the following two scenarios provide a better cup of coffee:
- Grinding from very good beans each time using the Wilfa Grinder, knowing that there will always be some old coffee residue on the blades.
- Buying 250g of the same very good coffee, but having it ground before delivery?