Have you tried to push cap down till it snaps and then twisting it on? That's what I found works best.
I emailed marketing @ lg over a week ago and haven't heard ananything.
some rep please help extremely frustrated with lg
Still no new caps?
Had the same issue with one of my caps too. Found that whatever side I got to screw on the tightest, if I tilted the bottle up leaning to that side, leaking was pretty much non-existent. Still kinda sucks but sometimes you gotta do what ya do.