Is a morning shower better for you or an evening shower?
The AM Show tackled the divisive issue on Thursday - and came to a conclusion.
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"I think it depends on what you're using the shower for," mused host Mark Richardson.
"If it's in the morning to wake up, then the morning will do you better, won't it.
"But if it's in the night to just wash the daily oils off, to prepare yourself for a good night's sleep - then the night one will probably be best."
Duncan Garner agreed on the importance of skin hydration.
"Do you use moisturiser? You have moisturiser? I've become quite a moisturiser kind of guy," he said.
Then, he revealed the best time to perform your ablutions.
"A night time shower is better for your skin and better for your body clock than a morning one," Garner said.
"A morning one will boost your creativity... but the evening one is the one to have."
Overseas experts agree, saying an evening show is best to help you relax, while a morning shower will help wake you up and prepare for the day.
"A morning shower can help shake off sleep inertia and get you going, while an evening shower can be a relaxing part of a pre-bed routine," University of Arizona Sleep and Health Research Program director Michael Grandner told TIME.
"A morning shower allows for time to meditate and regroup before starting a long or hectic day," Yale School of Medicine associate clinical professor of dermatology Mona Gohara told The Independent.
"This mindfulness can decrease inflammation in the skin by keeping levels of a hormone called cortisol capped."
But Amanda Gillies - who showers twice a day - was defiant in the face of Garner's research, labelling it "crap".
"Shower whenever you like," she retorted.