My Husband bought me a Brother sewing machine, the $200 one with 100 stitches from Walmart back in October that is supposed to be geared for quilters. I read through the manual and it is one of those machines that you don't oil. But I have this black greasy gunk somehow coming down the needle bar - I think it's being carried on my thread - and getting this gunk on my quilts. Just little spots - it looks as if someone marked it with a black pen on accident. What's the deal with this? Has anyone else experienced this? I'm going to open it up and clean it today, but I've done a ton of quilting on my other machines and never had this. I'm annoyed to say the least.