Many people will wash at least some of their woolens in washing machines. I do this with some of my silk blouses but wash every wool sweater by hand (which is probably why my sweaters go back decades).
My grandmother had something like this modern appliance in the basement. (I remember it being very noisy.) She never washed woolens – or anything “nice” with it. She washed only bed linens and towels in it. (Pic source) Undergarments she washed on pots on the kitchen stove. (I don’t think she trusted machines.)
If this is the kind of washing machine you are using, I would recommend you not wash wool sweaters in it – even machine washable ones. 🙂
To wash your woolens in a modern machine, first put them in mesh lingerie washing bags. Be sure to use a gentle liquid soap and fill up the machine with cool water, lower in your sweaters, and turn on the gentle cycle.
If the sweaters are delicate, I suggest you not let them spin too much. Stop the cycle before it starts to spin fast (after most of the water has drained), and carefully take out the mesh bags.
If the sweaters are very wet, follow the towel rolling procedure in the previous blog post. Be sure and dry the woolens flat on a mesh rack. By the way, don’t put your machine-washable woolens in the dryer; dry them flat too.
In this picture, my daughter is modeling the (wool) sweater her great-grandmother (my grandmother) made me for my 16 birthday (almost 40 years ago). It is still in perfect condition.
In 10 more years, I will take a picture of my granddaughter wearing the sweater her great-great-grandmother made!