I just wanted to give my 0.02 on my current cloning success...
Supplies
-Brand new EZ Cloner 60
-Pioneer II Jr. flourescent lighting
-Clonex Gel
-Clonex solution
-Hygrozyme
-SuperThrive
-Fresh razorblades
-60 clones (20 Blue Cheese and 40 Red Diesel) coming from moms under 24/0 HPS lighting
This is the first time I've cloned aeroponically, previous attempts were always in rockwool or grow cubes. I did all this on 11/20/09, about two and a half weeks ago. I put 12 gallons of filtered tap water in the EZ cloner reservoir, Clonex solution (40 mL/gal), SuperThrive (1 mL/gal), Hygrozyme (8 mL/gal), and adjusted the pH to about 6.2. I cut pretty large clones, some as big as 6" with quite a bit of foliage. As soon as I cut each one I dipped the clone in the Clonex gel, put the clone in the neoprene collar, and put the collar in the EZ Cloner lid. After all 60 sites were full I waited another 10 minutes or so and then turned the EZ cloner on (sub pump and air pump). The clones initially stayed in the dark for about 6 hours. I hung the flourescent lighting about an inch from the tallest clone and after the initial dark period have kept the lights and the EZ cloner on all day long. I was really surprised at how high the TDS was, ~700 ppm, and thought maybe I had put in too much clonex solution but I let it ride.
For about 5 days, there was almost nothing to note. I didn't keep track of the water temperature, although I noticed it's a little warmer then my other hydroponic systems. pH rose a little bit but I've kept it between 6.0 and 6.8. By the sixth day, I noticed that little root tips were coming out from everywhere on the stems below the neoprene collar. At about this time I noticed that a lot of kind of organic gunk had settled in the bottom of the EZ cloner, but I did not change out the water, I just kept checking the pH. 3 of the 60 never sprouted roots and I took them out by like day eight. The other 57 (95% success rate) have grown beautiful pearly roots, and by day 17 the roots on the longest clones are like 4" long and hanging down to the sprayer nozzles. I plan on taking them out tomorrow, day 20. I'm gonna throw away the neoprene collars and use new ones next time. I'm going to clean it afterward with the 29% H2O2 and water, like I said it's pretty dirty in the reservoir
Everything worked out like I had hoped/planned for so I'm gonna keep doing it the same way for future batches. Maybe I was a little lucky, but I did my homework and read a lot on the message boards, and it paid off. Best of luck to you too!