Help with out of balance lipo........

[mk351e]

ok, so the other day I took my truck out and it stopped running. Turns out, one of the cells in my 6S lipo is out of whack with the others. I've only charged it and discharged it in balanced mode with the brand charger. What do I do? Keep charging and discharging until all is ok? Or do I throw it out the window, because it's going to explode??

Battery is 1 year old Hyperion 6S (enerland cells), and charger is the hyperion ac/dc unit. HELP!