Cloning Help

Someone please help me. I followed all the steps to properly clone and it appears my clones arent gonna take AGAIN. After a week they are laying flat and look dead. I have them under a 150 watt 18/6 light cycle. I am misting three times a day. They are in a humidity dome and are about 12 inchres from the light. I cut on an angle dipped in rooting gel and put them in a premade rockwool. Any helpful hints I dont want them to die

If the leaves are starting to yellow, it simply means they are rooting. That is the time to feed them with a weak nute mix. Fox Farms Big Bloom is good for that. I mist with nutes at this point and I soak cubes in mix for 5 minutes and place them back in the dome. First sign of roots, they get planted. cut off any big leaves and only leave the tops. Also make sure you cut off any bad looking tips you may get from the high humidity.

It can take up to 3 weeks to get roots showing. Just remember, when you see yellowing, it means plant roots are growing and looking for Nitrogen. Feed then lightly.

I also keep my clones under 24 hours of light until they get transplanted, then to 18/6. Be patient, as serapis said, it can take up to 3 weeks for them to root.