still training puppy so he has had a few accidents in the utility where he sleeps, was mopping floor this evening and thought it smelt a bit pungeunt. lifted lino and there are big wet patches in 3 of the corners of the room. its foul!!! have binned the lino and everything out of room but does anyone know how i get the urine and smell out of concrete??? please dont tell me im stuck with this. TIA