How do you all deal with cats peeing on the sofa?
Problems on sofa seats are very difficult to remove.
First, use a cleaning agent with water to wet the area where the urine is being urinated. 
Second, use camphor. Make a small hole in it and put it inside the sofa. Also, remove the black cloth under the sofa (it's just for dust protection and has no other function) and put it inside.
Third, thoroughly clean the sofa to completely remove the cat urine smell. Even the slightest odor will cause it to continue urinating there. You can spray some lemon-scented or orange-scented deodorizer, or place some orange peels on it; they don't like that smell.
