After many cruises I have learned to streamline my packing with travel size toiletries and mix-match outfits. With the fees for checking luggage, I prefer to roll and jam stuff in a carry on then send clothes out for PRESS ONLY once unpacked… less $$ than checking luggage and less packing stress. Wash and fold services can be cheaper than checking luggage also.
I don’t mind hand washing and hanging to dry overnight. If not completely dry, I hang inside the closet until the cabin cleaning is done so not in the stewards way. Washing undies or a shirt while taking a shower is multitasking. 😉
Safety issues with a self-serve laundry: overloading, over detergent, hot irons (yes, even auto shutoff), lint traps….