In 2008, a study funded by the paper towel industry, the European Tissue Symposium, was conducted by the University of Westminster (London), to compare the levels of hygiene offered by paper towels, warm air hand dryers and the more modern jet air hand dryers.
Mwaka wa 2008, utafiti ulifanywa na Chuo Kikuu cha Westminster, London, na kufadhiliwa na sekta ya watengenezaji taulo za karatasi Maonyesho ya Karatasi Shashi ya Ulaya, ili kulinganisha viwango vya usafi vinavyotolewa na taulo za karatasi, vikausha mikono vya hewa vuguvugu na vikausha mikono vya kisasa zaidi vya hewa aina ya jet-air.