hey dude, check out my imaginary garden (link in my sig), go to post #34 and check out my DIY ez cloner.
it's actually not as sophisticated, just a reservoir and a couple of air stones.
since i made it, i've been getting nearly 100% success and within 6 - 8 days.
my reservoir is 2 gallons of water with approx. 5 - 6ml of ThriveAlive B1 Red and 2 drops of Superthrive.
the ThriveAlive is made by Technaflora but i'm sure any competitors B1 procuct would work.
the Superthrive is very expensive and very powerful, it cost me $60.95 for a quart at the hydro store. ignore all the bullshit on the bottle, it's only good for stimulating root growth, which is what you need.
be very careful, only 1 drop per gallon, otherwise you'll burn the shit outa them
another thing to consider is reservoir temp. you want it kinda warm, 70 degrees or a little more even, that'll help promote root development as well.

don't give up man, you get that baby dialed in and she'll pump out some clones for ya