you will be happyer moveing from the mason jar cells to the pro cells like the EBN dry cells.
i have built a great many of thos jar cels and found they just burn up or ware out in a month or two.
good for testing perposes and trying out to see if it works on a given make or modle, but then you need a real consumer generator, not the jars
you should try changing from the polycarbonat core to something that wont melt and twist up!
i traveled to FLA. this past november and attended the HHO GAMES,
i had a chance to talk to a few guys who dont make them with the polycarb core,
one guy showed me one made from a heavy duty tent peg he got at sams club.
the big ass tent peg makes a great core, it dosent melt and twist up,
some polycarb cores actualy become conductive too!
water is absorbed into polycarb and the electrolite also.