No way I know of to 'rethin" CA, since what's happened is that it's begun to cure. It's trash at this point, imo.

Now, in our "for what it's worth" department:

I have become an avid user of Mercury Adhesives CA. (http://www.mercuryadhesives.com/)

This stuff is AWESOME. I tell my LHS frequently "It's half price...cuz I get to use the whole bottle".

I won't go into details of how/why here (they have several pages on their website that do that) but, suffice to say, it scores over any other CA I've ever used in MAJOR ways:

I've regularly used an entire large bottle...no waste
It's fresher, and thus more consistent in speed, grip, etc
I've NEVER had a tip clog (And by never I mean not once...and that's through the assembly of 2 foamies, 1 small ARF, and 2 giant scale kits)
They even have low odor stuff that's MUCH easier on those of us bothered by CA fumes.

The price is right in line with other brands, and yet you waste far less.