I still can't figure out how to get 3 stars on missing machines, even after looking at the hints that have been given to previous commenters :(
Thats a tricky one! Two clues for you (spoilers) :1. If you iron clothes that don't need to be (not wet or wrinkled) they will get burnt!
2. Once you have that, try using turn 1 to immediately burn a shirt while washing another :)
Thank you :3