Well much depends on the relationship with your son and DIL.........and considering it was given to them and sounds like they did use it alot, its done.......the laundrymat and the front loader is a good idea too....
...If it were me I sould consider making smaller items the next time....for example Christmas stockings......pillows......small table toppers; perhaps placemats.........in my opinion if folks don't sew or craft when they receive something I have made they just don't have any idea how much effort and time goes into it. Its not their fault, and they seem to be appreciative upon receiving it at the time...........calla