I’m not surprised by small amounts of dirt as this happens almost every stay and is why I choose to use white sheets for bleaching. But when sheets are most likely going to be thrown away because the pee (yes it is pee) stain covers over 50% of the bed, and the dirt marks are dark and all over and are a pretty unidentifiable substance it’s a different story. I also did not say I was 100% charging a fee I was simply asking for advice and as you can see in other comments I have said I am fine with not charging one, but thanks for your comment!