Been spraying my clones with Optic Foliar's Overgrow. Don't know if it will help, but it won't hurt!
Ducksfoot clones ate stubborn little Beeatchs...... The momma was a clone I thought was dead. I went back to throw it out a couple days later ( this was after a month.... ) and There stood a pretty little plant, I was thunderstruck! So I've been babying her. could have taken clones 2 weeks ago but I let her grow more.
I started using Dip n Grow for my clones also. I've always done mine with no hormones but These stubborn things convinced my to try just about anything!