How long should you shower for? Scientist finally settles the debate - and claims you should only spend three MINUTES in there

For some people, a shower is a quick pit stop. For others, it's a spa, therapy session and concert venue rolled into one.Now, scientists have weighed in on just how long we should really be spending under the stream of water.According to Dr Pablo Pereira–Doel, an environmental scientist from the University of Surrey, people having a body–only shower only need three minutes to get the job done.'Three minutes is a sensible target for a body shower, with two more if you're washing your hair,' he told the Daily Mail. 'This includes leisure water, meaning enjoyment under the shower.'Ultra-conscientious bathers who turn off the tap while lathering could get this down to just one minute for a quick body rinse, two minutes if you add shampoo and three minutes with conditioner, he said. Experts said people should aim to spend four to five minutes in the shower in total, in order to cut down on water consumptionIn the UK, household showers last around 7.5 minutes on average, according to Dr Pereira–Doel.However, studies have shown that showers regularly run over 10 minutes, with some people spending close to 40 minutes under the stream of water.'As for why people linger… the answer is that for a large share of showers, getting clean isn't the point,' he explained.'Over four in 10 showers in our sample were taken for reasons unrelated to hygiene: relaxation, self–care, warming up on a cold morning. When a shower is doing that job, its length isn't a decision anyone is consciously making.'People in soft water areas tend to shower around a fifth longer than those in hard water areas, he said.'The likely explanation is that shampoo lathers more richly and rinses more easily in soft water, so the shower feels better and people linger,' he added.Morning showers also tend to be shorter, because most people have somewhere they need to be. Meanwhile, with evening or weekend showers, there is less of a time constraint.Low water pressure can also extend showers, 'because people may compensate for a weak spray by staying in longer to feel properly rinsed'. Researchers have found that somebody else paying the bill, living in a soft water areas and shampooing twice increases water consumption How to cut down your shower time Pause the water while shampooingShower in the morningInstall a shower timerUse less productOnly shampoo once By 2055, experts predict that England will face a five–billion–litres–a–day water shortfall with very real risks of disrupted supplies.Rather than relying on products such as water–saving shower heads, experts argue that changing everyday habits may be just as effective.'Shampoo once, not twice,' Dr Pereira–Doel said. 'This is the single clearest thing in our data and among the easiest changes anyone can make. Most people who lather twice do it out of habit rather than need.'He also recommends using less product, as over–dosing means more lather, and more lather means more rinsing.A device that provides real–time feedback, such as an in–shower timer, could help cut shower time, he added.And targeting long showers – for example those taken at the weekends – will be more effective than shaving 20 seconds off the weekday ones.Professor Ian Walker, an environmental psychologist from Swansea University, is serving as a key behavioural science adviser on the Let's Save Water campaign.The campaign asks people to try and get their showers down to four minutes or less, he said. 'When my colleagues and I measured 70,000 real–world showers we found the average was quite a bit longer than this,' he told the Daily Mail.'More interestingly, we found that there is a lot of variation from one person to another.'We suggest that most people have their own showering routine, which they tend to repeat pretty much 'on autopilot' whenever they get into the shower.'These routines often end up extremely different to other people's because showering is so private, meaning everybody evolves their showering routine without knowing what other people do, or what is 'normal'.'It might not be a bad idea for people to get this out in the open a bit more, and start comparing notes with others.'Showering typically uses about six to 15 litres of water per minute, and with the average Brit spending 6.7 minutes washing, that's a potential total of 100 litres of water.The government is currently aiming to reduce water consumption to 110 litres of water per day by 2050, meaning a long shower could blow your entire daily water budget.In one study, installing shower timers reduced the amount of time people spent under the water by 26 per cent.