There are launderettes on each passenger cabin deck with washing machines, dryers, steam irons and ironing boards. My only bug bear is that the nearest one to us on deck 5 (I didn't look inside the others) had no sink to do hand washing or tap to use for water for the iron so I had to go back to my cabin and fetch a glass of water. They sell washing powder tablets in the shop too. I hope this helps and you have a lovely time. Best wishes, Samantha.
Thankyou Samantha you have put my mind at rest as I am paranoid about creases in my clothes, now I can enjoy the cruise- I hope, Best wishes Gloria.