In a report that shocks only scientists, (we all knew these things were probably spraying fecal matter everywhere, right?) a study published in the journal Applied and Environmental Microbiology found that hot hair hand dryers actively spread bacteria all over your hands. The study also showed that “spores could be dispersed throughout buildings.”

The Washington Post notes that the authors of the study, “who found that the nozzle of the dryers had minimal bacterial levels, said that more evidence was needed to determine if the dryers were bacteria harbors themselves or just blew large amounts of contaminated air.”

The study recommends using HEPA filter dryers instead, which can reduce bacteria exposure by four times, which I guess is better than nothing. It’s worth noting that many people don’t properly wash their hands, and some people even seem to think rinsing them with water does something besides get them wet. Imagine all that leftover bacteria blowing in the hot wind of the hair dryer. Cool, right?