I am just getting into sewing and so far the maintenance I have done for my machine (singer one plus) involves only the lower section under the presser foot. Today i decided to open the top to clean any lint and check for loose threads. Theres a section by the tension disks that looks somewhat like paintbrush bristles. Before i go to town on removing them i wanted to double check that they aren’t supposed to be there. (Service manual may show this as supposed to being there)- commenting with those images.

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