You might want to consider an institutional education campaign (internal and external) regarding cellphone hygiene. Sara Jackson in Fierce Mobile Healthcare:
“Now two international studies have zeroed in on the role mobile devices might play in the infection cycle. One study, published in the June issue of the American Journal of Infection Control, found that patient and visitors’ cell and smartphones were 50 percent more likely to carry bacteria than healthcare workers’ devices. The other, a small study by Thammasat University Hospital in Pratumthani, Thailand, noted that cleaning phones with alcohol-based wipes went a long way toward controlling contamination.”
Curious? Bacteria and mobile devices: A growing danger for patients? – FierceMobileHealthcare http://www.fiercemobilehealthcare.com/story/bacteria-and-mobile-devices-patient-safety-starts-basic-cleanliness/2011-06-06#ixzz1OcSiXFXD
the Healthcare MarCom Letter 