Have been sewing for hours and hours for the past few days using silver Essentials thread, top and bottom. I cleaned the bobbin area each time I had to replace the bobbin thread and there was hardly any lint. Needed to switch to Coats & CLark black thread to sew a few strips to finish off another project, when I took the bobbin with the black thread out the bobbin area was loaded with black lint even though I sewed for an hour or so. I'm sticking with Essentials and have ordered the larger spools of the cotton threads in the neutrals, silver and natural, that I use a lot.