Leaking Valve Stem

I don’t know how you came to that conclusion? If you have bad tires that’s one thing, but a simple core replacement is like changing a light bulb. If you have properly identified that as the leak with spit or Soapy water, it’s a pretty simple thing to do. Ya goes down and buys the little box of cores and caps that has the tool in it, then park by an air hose and have at it. Oh yeah wear eye and ear protection and a face mask. Ok that was uncalled for. What dies your wife say?