I have a question about removing the tire pump nozzle after i pump the tire. Everytime I pump the tire to 120 psi, when i release the nozzle, I will hear a loud air leaking noise. When I attach the nozzle to the valve again, the gauge read about 100psi. What can I do so that I can keep my tire in the 115 to 120 psi? should I pump the tire up to 130 and then release the nozzle, or am I doing something wrong? Please help. Thanks for reading.