I've replaced all the caps...

Wow, never heard of the baking soda trick....from my model building experience I know that there are nowadays many different types of super glues....some are much thicker than the original watery flavor....you can speed up the drying time by spraying an accelerant made for this. Hell, there's even stuff out there that will release super glue bonds and get your fingers unstuck!

Check out most any well stocked local hobby shop and you'll be amazed at what's available.

Anthony