Run the microfiber bag under warm to hot water. Rub your fingers over the bag to loosen dirt, spots and stains. Turn the bag inside out and repeat the process.
Place a small dab of liquid dish washing soap on your finger. Rub the soap into the damp microfiber cloth to remove any stains or spots that water did not remove.
Run the microfiber bag under cool water to remove soap residue. Squeeze the bag to remove moisture.
Allow the glasses bag to air-dry.