What is different to wash clothes by hand or machine washing?
By hand washing: people always thinking more foaming will be
good, they like the powder detergent generate more foaming and
the supplier will add more active matter.
By machine washing: required low foaming, if it has more foaming
that very hard to rinse the foaming clean and maybe will lead to the
machine broken. If the foaming didn't been rinsed clean from the
clothes that the fabric will be hard-shelled and some people maybe