Hoping someone can help. My trailer tires on my Seadoo jet ski, loose about 2-3 lbs per month. They loose it quicker at the higher pressures, I inflate to 60psi per the specs. The karavan trailer is beginning its 3rd season. Last year I had the issue where after checking the pressure on one tire, it would not stop loosing air out of the valve stem. The shop "tightened" the valve stem and it stopped leaking. However fast forward to this year and the same thing happens on one side. Though I am not sure if it is the same side. It does stop once I monkey with it for awhile. Any ideas what is up with my tires, and are valve stems easily replaced without taking off the tire? Thanks
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