How to lubricate noisy joint on Dahon foldable bike? My Dahon foldable bike makes a huge noise whenever I fold the frame and unfold it. I tried spraying a lubricant into the joint. I do not know if the problem is continuing because the lubricant went around the joint and didn't enter it, or because I used the wrong lubricant. 

Has anyone else had problems with the fold across the frame with their Dahon bikes? How did you lubricate this fold?
For similar things on cars I use white lithium grease (e.g. this stuff on Amazon)—it is a good lubricant and sticks around the joint that you apply it to.

Any similar thick grease should work for this joint, but the crucial thing is getting it into the right place.  Taking the joint apart and applying grease to the mating surfaces is the best bet.