Dust Bunnies

I never before knew that dust bunnies reproduced like... well, you know, rabbits. We put up a plastic sheet over our bed to protect us, but we had no idea it would get this bad. This is what has accumulated since January sometime.
Edit: No, we don't sleep right under the plastic sheet. This plastic sheet is mounted on top of our mosquito net, so the plastic sheet is a few feet above our heads. All the dust comes from the ceiling (tin and wood) and blows in through the cutouts in the cement blocks that make our house.