Related:
What size dry bag is best for keeping and washing clothes?
Washing clothes on long hikes
After reading the first question above, I'm wondering to myself, is there an effective "bag method" for washing clothes while backpacking? I've never washed my clothes in a bag before, but I'm imaging soap and water with your dirty clothes in a roll-top waterproof bag then just shaking it, rolling it or working it with your hands similar to a front-load washing machine.
Is this a popular thing to do? If so then what are some good tips for effectively cleaning your clothes using this technique?