Another interesting documentary of Eastern Asia lifestyle!
The laundry/ swimming scene illustration is so lively and spontaneous!
As an information about silk washing, I don't know much about other western countries, but in Italy (where we have silk renowned of the highest quality we learned to produce after stealing silkworms and techniques many centuries ago importing such tissue in Europe too) we either handwash or use the washer at no more than 30 degrees (Celsius).
Panta rei (everything flows)!