related to how can i fix my miele G646 dishwasher?

I'm not Pete, but yes, take off the front covers by undoing the screws on the inside p of the door. You will see a black rubber pipe leading from the air vent.

Remove this - it just pulls off. You will find inside is full of what looks and feels like white grease. I clean this with a kettle of boiling water followed by a blow through (hint : don't suck ;) )I reattach the bottom end of the pipe, pour in more boiling water, and blow through again. The water vents out beside the soap dispenser.

I have a theory that the grease is caused by using eco dw tablets, and I have reverted to old fashioned powder. It hasn't returned YET. I dare say an occasional very hot was with an empty machine might be beneficial.

Andy
November 2008