Hi caterpillar guy,
6010 doesn't need to be kept dry like 7018. In fact, it needs some moisture in the flux, so being kept in an unheated shed is all right. I'm not clear about what you're saying about the heat. 60 to 70 amps DC is pretty cool for 1/8" 6010, although you get some help with the heat when you're welding vertical up, because the heat is building up ahead of the weld more than it would in any other position. If you're saying that the work seemed overheated when you finished welding, I don't know what to tell you. You can't turn the amperage any lower than what you've got it at now. If anything, I would suggest that you turn up the amps and move faster. But metal gets hot when you weld it. If it isn't causing warping or some other problem, I'm not sure you have anything to be concerned about.