clone trouble

i cloned three days ago and a couple of them are starting to yellow...anyone know what this means?

They sometimes start to go yellow. But it's hard to tell you why yours are without knowing what method you are using though.

i used root tech.
i watered them once with water with root accelerator
they are in a humidity dome
i am using cfls

Ok, just make sure the soil stays moist and don't touch them for 2 weeks. As long as you did the basics right you will be fine.

do you know of any signs that i should watch out for?

Baby them along This Is a Fragile stressful time for them ...Not every clone Lives ...roots take from a week or two to form During Which time the last resources (nitrogen and such) from the leaves will be drawn out to carry on life processes some yellowing or wilting of the lower leaves first is pretty common