Hady Shaltout

Hi There, I'm using Thermaltake Water 2.0 for about 10 years with no problems at all, suddenly the CPU reach 90 and 100 degrees, I thought because I didn't change ThermalPaste for 10 years so I got (noctua nt-h1), cleaned the CPU and heatsink and put 5 med-drops but unfortunately the CPU reach 105C degrees with zero load. The Thermaltake head (over CPU) very hot and one hose very hot and this odd because I touch it before and know it should be warm. What should I do? Can I replace the liquid inside? Or should I replace it with new one? I'm sure about connectors and the tubes vibrates but no cooling at all. Thanks