Spread the fabric over a large flat surface such as a table or ironing board. Make sure the area is well-lit and go over the fabric slowly with a household razor or electric fabric shaver. These tools will cut the bobble at the root and get fabrics back to their smooth finish.  Opting for bed sheets made of long high-quality fibres will reduce pilling in the long term, as it’s harder for the fibres to get tangled. Look for Egyptian, Pima, and Supine Cotton.