However, because there is an average of 0. 1 g of excrement on each pair of underwear, and there are bacteria on the excrement, even if it is washed and dried, the bacteria on it cannot be completely eliminated.
How to change underwear:
Wearing underwear for a long time will deform loosely, stick to the color of secretions, and the fabric will harden if it does not absorb sweat, which will easily aggravate the wetness of private parts. It is time to change!
1, 15 times: underwear for physiological period can only be used 15 times.
2, 20 times: sports bra can use it up to 20 times.
3, 30 times: daily underwear can be washed up to 30 times.
4, 6 months: wear underwear no more than 1 time per week for 6 consecutive months.
5. 1 year: underwear that has never been worn can be sealed at most 1 year.