Hi I just moved into a flat, the washing machine was a bit smelly with a bit of mould build up around the seal etc not too bad but decided to try to spruce it up.
I put it on a 90 wash with a splash of bleach and a bit of powder, the result was a thick coating of gunge around the back of the drum 
It's greasy grunge which won't come off easily, it was half an inch thick at the back it looks like it cleaned all the pipes and dropped it in the drum, has anyone had experience removing it please? Ive removed the main stuff but the drum it still coated, don't want to tell the letting agent yet as they might change me for it.
Thanks