Originally Posted by quiltingaz
I don't know what kind of machine you have, but I have never seen anything like that in bobbin case. I don't think something like that should be there. I think it is time for a service on machine.
I have the Singer Futura Embroider sewing machine I bought new about 2 years ago. So, it isn't one of the older machines and, yes, it is a wick and is very oily. I did get it back in and it seems to be working but I still have that thumping. I'll change the needle to see if that helps.