A recent survey from Eachnight revealed that about 30 percent of Americans have tried "dark showering" in low or no light, and 62 percent say it helps them sleep better, with some reporting falling asleep faster and dealing with fewer racing thoughts before bed. The method is simple, it costs nothing, and it doesn't require downloading or pretending to be a morning person. The science behind it is that warm water raises core body temperature and signals the time it takes to fall asleep. However, there are concerns about safety and potential issues with slipping in the shower.