Dusto it was suggested to me to try dip-n-grow for strains that take longer to root since it contains a fungicide as well as the hormones -Clonex doesn't.

Also I have recently stopped misting my clones at all- I keep a small dish of water under the dome with them and when I mist, it is on the inside of the dome itself, as I have had bad luck with new growth getting rot and am trying to minimize water contact with the plant material.

Oh and rapidrooters have b. subtilis in them, anti-fungal agent, I have been impressed so far.