cloneing trick?

just woundering if any one has a good cloneing trick for strains that are hard to clone? i have 3 strains growing right now, all unknown bagseeds, 2 are very easy to clone while the other seems almost impossible to clone, and that is the best producing and tasting plant iv got. any help would be appreciated, thanks

I heard of people have close to 100% success cloning aeroponically. check that out.

i also have close to 100% success rate on all my other plants and probably only a 20% rate on this one. it sucks cause its my best, dense, sticky, tasty, highest producer.