>>1913448Yeah it sucks, funnily enough it was an easy fix once I "upgraded" to some random valve cores I got on ebay years ago that were touted as high quality HVAC cores. Once I started using them I didn't get anymore gunked up valves and I can air up the tires no problem. At first I thought it was a fluke but I have like 6 tires with these in them now and they are all fine.