I have one that is weeping out the cap also . I have a couple cans from no spill and once in a while I have leaks so I replace the cap .
Maybe tightening the cap to much may squeeze the o ring away from were its suppose to seal?
I was up at 2:30 am this morning going to deliver fresh Italian bread to wholesale accounts for my friend . I would of loved to stay on here rather than to drive for 3 hours .