So here it is-perfect hygiene: according to scientists, you can not wash every day

When it comes to everyday hygiene — from brushing your teeth to taking an evening shower-you might think you've known everything for a long time. But right now, we want to shake things up a little bit. Following the advice of medical associations and professionals, Business Insider decided to describe the best ways to be clean, healthy and with sharp eyesight.

How often should I wash my hair?

The shortest answer is that no one should wash their hair every day. In addition, it all depends on your skin type: if it is normal or dry, one or two times a week is quite enough.

How often should I brush my teeth?

The American Dental Association recommends brushing your teeth twice a day for two minutes, although it does not specify what time of day it should be done. Especially careful brushing of teeth should be before going to bed. After all, while you sleep, the activity of the salivary glands decreases sharply, therefore, the teeth are less protected from caries.

When is the best time to apply antiperspirant or deodorant?

The ideal time is before going to bed. If you use an antiperspirant in this way, you give it enough time to block the sweat glands before they start to sweat out in the morning. Most of these products are effective for at least 24 hours, so do not worry about the possible smell of sweat until the end of the working day.

How often do I need to shower?

It turns out that most of us shower too often. According to the dermatologist, it is actually enough to take a shower only once every two or three days, although, of course, it also depends on where you live and how often you exercise. When it is better to do it-in the morning or in the evening, depends on many factors. However, if you have oily skin, it would be ideal to take a shower in the evening.

How often do I need to floss?

The American Dental Association recommends flossing once a day, but in August 2016 this recommendation was called into question, as the effectiveness of flossing has never been investigated. Therefore, it is quite possible that the use of dental floss is not necessary. Like this.

Do I need to use a mouthwash?

According to the UK's National Health Service, using a mouthwash containing fluoride can help prevent the development of tooth decay, but this should not be done immediately after brushing your teeth. This action is much more optional than brushing your teeth, and is not necessary for everyone.

How often do I need to cut my nails?

It depends on how long you want them to be, but it's quite enough to do it once a week or two. Just make sure you don't leave any jagged edges that can catch on something and possibly ruin the nail. 

How often do I need to clean my glasses?

According to Optometry Australia, as often as it takes to see well. Just don't use your shirt. It is not necessary to have a fashionable spray — enough dishwashing liquid and water. Wipe your glasses with a clean cotton cloth.

How often do I need to change the shaving cartridge?

Of course, it depends on the razor, but if you feel that the blades are pulling the skin, they are probably blunt and it's time to replace the cartridge. In order to keep the blades sharp for as long as possible, be sure to rinse them with hot water after use and let them air dry so that they do not rust.