my right rear tyre leaks about 6psi a day. i was unable to find the leak even after squirting the entire tyre/wheel assembly down with soapy water and looking for bubbles. i checked the entire tyre and wheel, along with the vale stem. in disgust i took the tyre down to the local shop and had them examine it. they broke the tyre and wheel down to look and they could not find any leaks or holes. as a precaustion i used this time to install a new valve stem. i took the tyre homeand checked it. after a few days it was down 12psi. out of sheer anger i jumped in my jacuzzi with the mounted tyre and wheel and sat very still holding it underwater looking for air bubbles to surface. after 10 mins i saw none. i am very ****** off at this point and not sure what to do. i am using the fullsize spare tyre and wheel as of now untill i can fix this problem. anyone have suggestions? i am ready to go crazy.