I've found that the larger the clone, the harder it is to get to root. I try to keep them at 3-5" tall/wide 4-8 nodes, and trim the larger leaves in half.
the big ones are full tops from my 4 foot mother she was gettin too tall and bushy crowding everything else hahaha so now shes about 12 inches shorter. so in the cloner i have about 6 that are about 12 inches and look like full healthy plantas beside the other cuttingh lol. thanks for the info man i'll trim up a fiew more leaves
just a thought but i took them last night and there not wilting at all so do i need to trim them? or wilkl leavin the leaves make it longer to root too