According to Prevention magazine, you could be sharing your bed with anywhere from 100,000 to 10 million dust mites. The thought of that alone may be enough to make you jump out of bed. But it’s the fact that dust mites are a common allergen that is the real sleep thief. To limit dust mites in your boudoir, dust and vacuum regularly, use sheets and mattress protectors that block them and crack a window to increase airflow.