how do I keep dispenser and door seal clean on Hotpoint Aqualtis?

How do I stop black gunge building up in dispenser compartment and also on door seal inside the drum? Not only black gunge collects all the way through the dispenser compartment but the dispenser drawer never fully empties of detergent or fabric conditioner. The door seal has a black stain which is almost impossible to remove even with the Hotpoint cleaner and the smell is bad. The washer is an Aqualtis AQGD169S.
PPL58, October 2013


done
door seal is due to not doing regular boil wash and dispencer is due to conditioner.goes black and moldy.It happens to most low temp wash family washers

CK, October 2013
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