Cleaning the spot/stain can become a real problem if not treated correctly. I suggest to use the KISS process (keep it simple st....),
A simple way to treat most spots is 10ml dishwashing liquid in a large glass of water, then gently work the spot/stain to the centre. If there is no transfer to your rag(white rag) then leave for a professional. Do not over clean and create a hole or fuzz your fibres.
Urine stains take a lot more effort to clean as shown below if treated ASAP.