We all love the feeling of fresh, clean sheets, but how often do we actually wash them? For some people, changing the bedding is a weekly habit. For others, it can easily be pushed back for a few more days… or even weeks.
The thing is, our beds collect much more than we realize. Every night, sweat, dead skin cells, dust and tiny particles build up in our sheets. Add hot summer nights or a recent illness into the mix, and your cosy bed can become a place where bacteria and allergens quietly gather. So, what is the right schedule for washing your sheets?
Your Bed Might Be Dirtier Than You Think
Your bed is where you spend around a third of your life, so it makes sense that your sheets pick up a lot along the way. While they may look perfectly clean, they can collect sweat, skin flakes, body oils and other invisible residues every night.
According to New York University microbiologist Philip Tierno, sheets that are left too long between washes can become a “botanical park of bacteria”. His recommendation is simple: wash your sheets at least once a week to keep them fresh and reduce the build-up of unwanted microbes.
The need for regular washing becomes even more obvious during summer. When temperatures rise, we naturally sweat more while sleeping. That extra moisture stays in the fabric and creates a more comfortable environment for bacteria and fungi. People who experience night sweats may want to wash their bedding even more often, sometimes every four or five days.
The same applies after being sick. Once you start feeling better after a virus or infection, changing your sheets can help get rid of germs left behind during those days spent resting in bed.
Of course, everyone’s routine is different. Someone who showers before going to sleep, wears clean pyjamas and keeps their bedroom well ventilated may not need the same washing schedule as someone who sweats heavily at night.
Your Dishwasher Glasses Keep Coming Out Cloudy? Here’s the Mistake Almost Everyone Makes
Pillowcases Are The Forgotten Part Of The Bedding Routine
When it comes to bedding, sheets usually get all the attention. But your pillowcase might actually need more care than you think. Since it sits directly against your face for hours every night, it collects sweat, skin oils, hair products, skincare residue and dust.
According to Stephanie Roberts-Baxter, product manager at Koala, pillowcases should ideally be changed around every two days. That may sound like a lot, but pillowcases have a much closer relationship with your skin than the rest of your bedding.
Research from Amerisleep also looked at the bacteria found on pillowcases after several days of use. The results showed that they can quickly become home to large amounts of bacteria, sometimes at levels much higher than everyday surfaces we usually think of as dirty.
Keeping your bedding fresh does not mean spending every weekend doing laundry. A few simple habits can make a difference. Washing pillowcases regularly, airing out your bedroom, cleaning your duvet and letting pillows breathe can all help create a cleaner sleeping space.
The type of fabric you choose can also change how your bed feels. Cotton and linen sheets are popular choices, especially during warmer months, because they are breathable and help manage moisture.
What Is The Perfect Sheet-washing Schedule?
There is no single answer that works for everyone. A 2022 Sleep Foundation study found that around 36% of people in the UK change their sheets every two weeks. Younger adults are often more likely to wait longer, with some 18-24-year-olds saying they leave their bedding unchanged for several weeks.
People also adjust their habits depending on the season. In summer, frequent washing is more common because of heat and sweating. During colder months, some people naturally wash their bedding less often because they sweat less at night.
Other factors matter too. Allergies, pets, skin sensitivity and personal habits can all influence how often sheets should be changed. Someone with pets sleeping on the bed will likely need a different routine from someone who sleeps alone in a cool, clean room.
For most people, washing sheets once a week is a good target. If that feels difficult to maintain, every two weeks is still a common habit, especially when combined with regular pillowcase changes and good bedroom ventilation.
