CO2 Reculturing Question & a note of gratitude.

Yet ANOTHER DIY yeast CO2 system question..... when the old solution
in the jar is just about spent, instead of seeding the new solution
with new yeast.... can it just be re-cultured with a little bit of
detritus from the old solution? I was figuring that if this was
possible, a turkey-baster or medicine-dosing syringe might be the best
method of doing this. Any thoughts?

BTW... wanted to let you all know that I've greatly appreciated all
the help and information that I've received so far from this
newsgroup. Especially about the yeast CO2 systems.... I now have two
great CO2 systems up and running on a couple of my "pet project"
heavily planted tank displays at work... and the higher-ups as well as
my coworkers are very impressed. Many thanks to all!!! The plants in
the shop have never done so well.