Having been following the green cotton thread, thought I should see what I have.
I found an almost black oily gunged-up filter that looks as if it is the original one put in six years ago.
Will get a new filter tomorrow because I can't put this one back in, and have think about upgrading to green cotton after,
However, the filter housing is needing a clean-up because it is oily, but I am wondering about a sponge -looking oily lump in one corner.
Can I ignore it and leave it there - I don't know what it is supposed to do - or do I need to do something?