Hi,Welcome to Just Answer, My name isXXXXX will be helping you with your appliance issue today.
what was the name of the cleaner you used? this oily substance is probably all the old soap and water thats built up in the pump assembly, what is the make and model # ?
the rentors are not there but do you recommend a way to clean the pump ...? vinegar? the cleaner was just one you buy at groecery store to disenfect and clean dishwasher. i can find out more later