Ugh...I give up.

[bcr229]

Also, warmer air has a higher water capacity than colder air and will help keeping humidity up.

Actually this is incorrect. Since warmer air has a higher capacity to hold water, the warmer it is the lower the humidity for the same amount of water in the air. This is why it's so hard maintaining humidity in a tank; the warm air carries the humidity up out of the tank with it.

Think of air as if it's a bucket, and the warmer the air the bigger the bucket. Take a small bucket (low temperature air) and fill it up to the top, and you have 100% humidity. Pour all of the water into a bucket that can hold twice as much (your high temperature air) and the relative humidity drops to 50% because the bucket is half full.