Originally Posted by
mardilee
I tried this with a wool sweater I bought at a garage sale. The problem was I have a new "energy efficient" washer. It never get hot enough to shrink the wool:-( The good news is my t-shirts and other clothes don't shrink in the wash either. A friend told me I could boil the sweater on the stove, but I need to keep stirring it because the motion helps the wool to shrink. One of these days I'm going to try it.
Yes, it's agitation as well as heat and detergent that cause the felting.