Fill the decanter with white vinegar.
Pour the decanter full of vinegar into the coffee maker's reservoir.
Return the decanter to the correct position under the brew basket.
Select the machine's regular brewing cycle and switch it on.
Switch the machine off when brewing is complete, but leave the vinegar in the decanter for two hours.
Unplug the machine.
Rinse the decanter and fill it with cool water.
Pour the water from the decanter into the reservoir, swish and pour the water back out into the sink.
Refill reservoir with cool water.
Place the decanter into position under the brew basket.
Plug in the machine and switch to regular brew to allow the water to run through the machine.
Repeat steps 9 through 11 at least six times to rinse the vinegar from the machine.