There are tons of laundromats around, as well as drop off places, but you can also make it really easy on yourself while on vacation (or it's raining) and call Room Service.
They will ask you how many bags you have, and that determines what scooter with the small, covered box or the scooter with the large covered box will arrive.
They pick it up in the morning, and it will be back that afternoon.
The service charge is 25p's, plus the cost of the laundry. (higher delivery fees south of the island)
Room service is not just for food deliveries.
They will pick up just about anything you need. Groceries, medications, pay bills...