Sterile is key when cloning.if you have them in the pod and used a small amount of clone jell then domed and they live for several days your on the right track.dome must be air tight and little next to 0 light is needed,light is for root development ,new clones are rootless,just make sure the sponge pod is damp,not wet,and spray all clones every 3 days or so.use
clonex clone nute mix about half strength and add a drop of dawn soap that's per quart .give um a shot every 3 days or so.keep dome sprayed also.check in 2 weeks.usally 3 to 4 weeks you'll have roots increase light to ambient light say 100 par maybe 150 ,after good root development cup um.and dome them giving a small amount of air.increase air to them every 2 to 4 days till acclimated with full open air.increase light to 200 to 400 par and your off to reces.
There's many ways to clone but this has been taught to me by a pro and works every fine.every time.
Good luck.