I had this same problem with my RB rack. I live in Mississippi. I got mine down to 55-62 by keeping the water bowls filled 1/3 of the way. You might want to purchase some smaller bowls. I found that drilling/soldering more holes than 3 rows x20 does not make any difference. I learned this by messing up the first bin I was tweaking everything with.
Also, I turned my ceiling fan up to mid-high setting. If you don't have a ceiling fan you can buy a decent table top one from Wal-Mart for $15-20.
Doing all this brought my humidity down in the 70's.
The best purchase was this table top De-Humidifier. They can be expensive if you are needing to get the humidity down of an entire room. But, this works fine for 4-5 racks.
http://www.amazon.com/gp/product/B00...ls_o01_s00_i00
$40 Bucks and works awesome as well as being almost silent compared to a table top fan.
~~~ BIRT ~~~
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