Cellphones carry 10 times more bacteria than most toilet seats. "When's the last time you cleaned your cellphone?"asked Charles Gerba, a microbiologist at the University of Arizona. While toilets tend to get cleaned frequently, because people associate the bathroom with germs, cellphones and other commonly handled objects - like remote controls - are often left out of the cleaning routine. Cellphones pick up germs all the time, Gerba said. "I see people talk on their phone on toilets."