How do you go about "hand-washing" an item? In the bathtub with warm water? Detergant yes; Detergant no? Do you just rub the item against itself for friction? Maybe use a brush? I ask because I have some very important items that I want to last forever, such as my baby blanket that my daughter uses, clothes that were expensive, etc. A friend suggested to me that I hand-wash my clothes, and I've heard the term, I just don't actually know how to go about doing it.