Answer the following question, but give the rationale first. Should wool be hand washed only?

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Felting is a process through which wool is shaped and shrunken through agitation in soapy water. Felting will often occur if you put a wool item in the washer. So the final answer is yes.