Don't.
The nutritional value of the powder inside the pork sausage is very high, usually only need to use boiling water to scald the pork sausage can be, and do not need to be specifically to wash off, otherwise it is easy to cause the loss of nutrients, the loss is not worth it.
Washing pig vermicelli is mainly to wash away the dirt inside the small intestine, that is, the residual feces, otherwise the vermicelli out of the easy bitter, very difficult to eat, but also extremely unhygienic, as for the powder inside, it is recommended that the best not to care.
Extended information:
Precautions:
There are some pigs that grow, for Some reason mono overproduction or poor access, making the pig small intestine, pig large intestine and other digestive organs, bile gathered too much, will make the pig small intestine bitter taste increase.
There are a lot of digestive juices and food residues inside the pig small intestine, these digestive juices have a bitter and fishy odor, when cleaning these mucus, you should make sure that the mucus has been thoroughly washed, but also avoid rubbing for too long to break the mucous membranes and cause the intestines to be bitter.
Baidu Encyclopedia - Pork Vermicelli