Fabric lampshades can be tricky to dust not only because dust clings to the surface but because they are often delicate and easily damaged. Vacuuming with a soft-bristle brush is effective and generally safe if you do it gently. Another way to do it is with a microfiber cloth, again gently.
Here is a great idea for cleaning your blender without taking all the moving pieces, including the sharp blades, out. Put some warm water, baking soda, and dish soap in it and push pulse a few times. A good labor-saving technique.