I'm pretty sure blue loc-tite isn't the high strength one. I once ran into red loc-tite at the bike shop I work at. it took 4 guys about 10 minutes to get the bolt to turn. I see blue loc-tite all the time though. so I think you've got your colors mixed up.
ruktions and huselfelts are both very cheap cranksets. if they are giving you trouble, I would replace them. if you need something cheap get a pair of cheap bmx cranks. i guess that would only work for single speed though.