Looks difficult...

The coffeemachine... 
Dismantled because every day there appeared a bit of brown water under it.
The Melitta helpdesk gave me some hints about a malfunctioning drainvalve and a workaround so I ordered a new one and gave it a chance...
It took a few hours but it seems to be working allright now.
And it only costed 20 euro's.
Allways better than have to buy a new machine.