Klean Heat
I agree, I use Klean Heat in the bobbin area, and to clean the machine in general. It is odorless kerosene. I use q-tips with it. The Elna Grasshopper manual says to use a few drops of kerosene in the bobbin area to lubricate and clean, Fair warning though, don't let it soak into your clothes or thread, it will eat through, let it dry first before putting a bobbin in.