Hi Everyone

I hope you can help me. I have a Zanussi washing machine, about 3/4
years old.
When you take the soap dispenser drawer out, at the look up (into the
machine) the water inlet holes are covered in a black rubbery like
substance. This also extends to the back and works its way into the
drawer, which needs constant cleaning. Sometimes the machine is unable
to take in the softner (I think the holes above it may block from time
to time). I only use the minimum of soap powder.
Any ideas as to what this black substance is, and more importantly how
do I get rid of it?
Joan