Question off-topic, but dear housewives, how do you get rid of urine s…

Question off-topic, but dear housewives, how do you get rid of urine smell on carpet? We moved into an apartment and it smells like urine all over. I washed this carpet everywhere with detergents, baking soda, iodine, in general, tried all the methods and seemed like the smell went away, but now spring has come and again it smells awful, I don't know what to do. Can't take it to wash as it is glued to the floor and cement flows from below.