Purely curious. . . Because the former Canadian roommate saw me washing clothes by hand, she was stunned, and after careful observation, in fact, the foreign classmates basically throw everything in and wash them together, from childhood to adulthood, in the apartment at home and school. But I just checked the other similar answers on Zhihu. They all said it was unsanitary, but I didn’t seem to see any problems with foreign students. .
In addition to feeling psychologically troubled, is this reasonable from the perspective of hygiene?
Answer the question first: it is hygienic.
This is a question of being hooligan when talking about toxicity without a dose. The washing machine is a complex environment. In fact, this environment has pathogens, plus the pathogens in the clothes, plus the laundry detergent/powder, so it is difficult to quantify. But there are several conditions that can be determined-
- Detergent has a strong ability to remove grease, protein and other attachments, far stronger than ordinary soap. Therefore, it is almost certain that the reproduction environment required by most common human bacteria does not exist on the washed clothes, and most common microscopic pathogens are difficult to retain.
- The washing process is mainly repeated beating and squeezing. With the addition of detergent, this process can remove most animal pathogens. Therefore, clothes washed under good conditions (that is, a relatively clean washing machine, sufficient detergent, and ordinary dirty clothes) are clean enough. It is not possible to completely disinfect, but generally enough to completely lose the ability to infect the pathogens in the clothes. Because pathogens need a certain scale to infect the human body, it is not just a bacterium that can breed a plague. But the scale of this need often depends on your resistance. However, there are still pathogens on the clothes that have just been washed, and the environment is suitable for pathogens to multiply-there is water and a little nourishment (the clothes themselves and a small amount of protein and carbohydrates in the environment). If left alone, pathogens that are still alive in clothing may multiply to the point that they are capable of infecting. If the conditions are worse, such as exposure to dirty air, it is likely to be contaminated with more pathogens. Therefore, drying in a clean environment in time is very important, even more important than using disinfectant water, because disinfectant water only kills the existing pathogens, and drying in time or in a dirty environment will introduce more pathogens. Therefore, generally speaking, clothes that are cleaned normally only need to be dried in a clean environment in a timely manner so that there is no need to worry about the additional risk of infection. How to achieve such an environment?
1) Wash the washing machine frequently.
2) The washing powder/liquid should be put in accordance with the instructions, do not save or excessive. If it is hand-washed, pay attention to the soaking time not too short or too long. (Thanks to @shand Demon for adding)
3) Wash the clothes according to the water temperature required by the clothes. It is recommended to wash clothes with different washing temperatures separately.
4) Take out the washed clothes and dry them as soon as possible. Do not leave them in the washing machine for a long time or even overnight.
5) Dry indoors or use a dryer instead of drying outdoors. If you use a dryer, you must clean it up as required as a washing machine.
These methods are much better than using disinfectant.
If you are really worried about cross-contamination caused by mixed washing, I personally recommend using protective gloves and using laundry detergent to wash clothes separately, which is much more effective than soap. At the same time, it is still necessary to dry in a clean environment in time, otherwise the effort will be wasted. Many people have expressed doubts about indoor dryness, mainly thinking that sunlight has a sterilization effect and questioning the effectiveness of indoor dryness. Sunlight in the outdoor environment does have a good bactericidal effect, but there is also a lot of dust in the outdoor environment. Dust is not only dirt but also often includes a large number of pathogens. These pathogens have been tested by the sun. They attach to the clothes to kill the sun. Can’t drop. The bactericidal effects of sunlight are mainly two, one is ultraviolet light, and the other is high temperature. Although ultraviolet light has a strong bactericidal effect, its penetration is very weak, and a denser fabric can completely block it. The effect of high temperature is more in-depth and significant, and it is indeed effective for sterilization, but if the clothing itself is already clean, it is of little significance to use high temperature. On the contrary, there will be dust contamination outdoors. So if the indoor sun can be dried, the natural effect is very good, but it doesn’t matter if it doesn’t. Unless your indoor environment is dirty, for example, the house is too old, mold grows everywhere, the drying is too slow and the dust is not less than the outside, it is indeed not as dry as the outdoor. However, if the conditions are so bad, my personal recommendation is to use a dryer. Add some answers to the questions that appeared in the comments. ——Can the washing machine wash shoes? Shoes and clothes are labeled with cleaning instructions. You will find that most of them say that you don’t need to machine wash, but only allow hand washing, dipping, and natural drying. In other words, washing shoes in a washing machine does not necessarily wash them cleanly, and it also hurts shoes. Of course it hurts the washing machine. ——Is the disinfectant useless? It is not that the disinfectant is useless, but that the benefits of using the disinfectant under normal conditions are small. The general condition here is that the clothes themselves are not contaminated with many highly pathogenic, high viability pathogens, and the washing process is reasonable. If you are worried that your clothes are contaminated with pathogens that are difficult to remove, or a large number of pathogens are contaminated, it is useful to use a disinfectant. But the same, please strictly follow the instructions on the instructions.