first of all, I see a lot of mfgrs say that 70-75% rH is key, but from personal experience as well as the opinion of many seasoned BOTLs, you want to shoot for around 65% so you're doing great! From past experience, cigars burn a hair too slow at 75%, and below 65% they tend to burn too hot. I've found my sweet spot at 65%.
Second, I would HIGHLY suggest investing in some heartfelt beads or a Boveda Pack. I have not used a Boveda, but once I used some heartfelt beads I tossed every bit of floral foam and "cigar juice" I had! They might be slightly steeper in price, but totally worth the investment! My coolidor stays at a consistant 64-65% rH! When it drops at all, I simply recharge my beads and I'm back to cruising altitude!
Third, I'd get rid of the cigar juice and just use distilled water. I think the cigar juice is more hype than it is anything else, to be perfectly honest. Consider this: that you can purchase a gallon of propylene glycol for $20 and a gallon of distilled water for $.88, and a 16 oz bottle of "cigar juice" (50/50 distilled water and propylene glycol) goes for $12, the math just suck! If you made it yourself, you'd have 256 oz of "cigar juice" for $21, equal to 16 bottles! So, pick up some propylene glycol, a gallon of distilled water, and some bottles, and you'll theoretically make (or save) yourself $171. 'Nuff said...