How do you make my wool sweater softer?

Some wool is just naturally scritchy, depending on the breed of sheep the wool came from. For example Suffolks wool is very scritchey where as baby doll sheep have very soft wool. You can sometimes get wool to felt, making it a bit softer, by lot of use/wear, washing it with lots of fabric softner in very hot water over and over again and by also drying it on a hot setting. It will shrink a bit, sometimes quite a bit so be sure you are ok with that happening, but it will become softer.