Paper lampshade: Dust the paper lampshade using a DRY duster, soft cloth or a microfiber cloth. For soiling or stains, make sure you dust off the lamp FIRST, and then use a slightly moist soft sponge and wipe the shade gently (the lampshade is made from special water repellent paper).
Glass body: Dust the glass body using a dry duster, soft cloth, or a microfiber cloth. For soiling or stains, make sure you take off the lampshade first, and then simply use a slightly moist soft sponge with a little soap if you like and clean the body gently. Then dry with a soft towel.
If you would like to clean the inside of the glass body, unplug the lamp first, remove the glass body from the fixture plate with a turning movement (bayonet mount), lay it safely on the side, and gently swipe from the inside.