pee smell

My guinea pig Pumpkin is very anti social she doesn’t like coming out of her cage at all so the only times i take her out is when I weogh her and i’ve noticed there’s pee or maybe even poop stuck to her lower back and around her bottom i have a photo attached i’m very worried about her she is...

So as time is going on i am beginning to smell the distinct guinea smell from my two skinny pigs and wondered if anyone can advise me what is the best way to wash fleece/liners? as i wash them 40 sometimes 60oC and can still smell the Pee smell on the liners even after washing them at these...