My daughter has a uti, her urine has gone from smelling like fish which we are used to with uti's, now it smells like smoke. Why does it smell smokey?

That I couldn't say; perhaps another HT doctor can. I would be more concerned about why your daughter has recurrent UTI's, whether she has vesico-ureteral reflux of infected urine &, if so, what needs to be done to protect her kidneys. Her primary physician or a pediatric urologist can sort this out. .