Studies were conducted to determine the effects of grid bar spacing, grid sharpness, saw speed and grid-to-saw clearance on lint cleaner performance and fiber quality. The amount of lint wasted by the lint cleaner increased as grid spacing increased, but bar spacing had no measurable influence on fiber quality or on trash removal rate. New, sharp grid bars wasted substantially less lint and removed slightly less trash than did worn bars, but there was no evidence that the sharp bars did more damage to the fiber than did the dull bars. Increases in saw speed increased both lint wastage and trash removal, but had no effect on fiber length. Fiber nep levels, however, tended to increase slightly with increases in saw speed. The smallest grid-to-was clearance evaluated provided slightly better cleaning than did a larger clearance, but the small clearance tended to waste more lint and produced poorer fiber length characteristics.