We suggest using one damp towel and one dry towel. Fold the towels twice to make an 8"x8" square that fits perfectly in your hands. Wipe the glass with the damp towel to remove any dirt/grime and follow up with the dry towel to remove any moisture and residual streaking. When the towel section becomes soiled flip the towel to a new clean side, so that you are always using a clean towel section.