I have discovered that each of my machines work better with different makes of thread. My bernina will sew with any cheap, poly and cotton. The janome loves all gutterman and the singers love cotton. Lint build up sorry not sure why man came in. Every new bobbin clean area so very little lint build up. Fill bobbin empty fluff. If need bigger clean, do after each finished job clean all over as this also gets rid of coloured lint before using white it marks it.