I live in a mobile home. During the winter all the strays have decided it would be a good idea to take shelter under my home, using it as a litter box as well. For some reason when I open my dryer, the smell of cat urine seeps out. I don't know where it is coming from in the dryer. My father told me to get an indoor dryer vent kit because it will help eliminate the smell and help heat the house. Can I take this vent off in the summer when it gets too hot in the house?