We told our stateroom host and he put a plastic liner underneath the sheet on the first night during the turndown service. After that he put a waterproof protector on the bed and we were fine. We had one wet night and our host was very understanding. I did strip the bed for him and it was no problem.
Does anyone know if it is possible to put a request in for this prior to boarding so the stateroom host doesn't have to remake the bed during the turn down service? Seems like it would save them a step & possibly make their job a little easier.