Mua chất tẩy rửa loại mạnh như trinatri photphate (TSP). Rót hỗn hợp TSP lên sàn và dùng bàn chải chà nhẹ nhàng. Rót nước nóng lên khu vực đã xử lý và dùng máy hút bụi ướt/khô hoặc máy hút bụi công nghiệp hút toàn bộ chất lỏng.

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A heavy-duty cleaner will ensure that all the all the other elements of the urine (like the bacteria) are completely removed and the enzymatic cleaner can work faster to dissolve the uric crystals. Make sure you wear protective goggles and rubber gloves, as TSP can damage your skin.  Mix TSP in a bucket of very hot water at a ratio of 1/2 cup for every 1 gallon (3.8 L) of water.  If you don't want to use a heavy-duty chemical like TSP, try cleaning with a water and vinegar mixture (2 parts vinegar to 1 part water) instead. Work in small increments (about 3x3 feet). It is important you do not allow the TSP to dry out too quickly. It should sit wet on the surface of the concrete for at least 5 minutes. If the mixture dries before 5 minutes have passed, add more TSP mixture or water to the area. The longer it remains wet, the deeper the mixture can penetrate the concrete. You will probably notice the urine smell grows very strong as you pre-treat the floor. This is a normal reaction of the uric acid crystals and the water. This will remove much of the spent TSP solution. Then rinse the floor with hot water twice more and allow the floor to dry naturally overnight.  Don't use fans to speed the process along--your goal is still to saturate the concrete and loosen up as much of the urine residue as possible. If you find your vacuum smells like urine after sucking up the TSP mixture, spray the hose with the enzymatic cleaner (diluted to 1 part concentrate to 30 parts water) while the machine is running. Then turn the machine off and spray the inside of the dirty water tank.  If you use a carpet cleaner, add water to the tank instead of pouring water on the ground and run it in a rinse/removal cycle.