ya keep in mind clones can "drown" just like a full size plant (i left clones in a 12oz bottle for a week once when clone broke and just the few hours above water after they sucked it all up got them too room :P)
i have not noticed "shaving" clones helps as much as making shear you have a slant on the bottom cut,
trim the tips off of the bigger leaves
dip clone stalk in undiluted clone nuts
i dont like using anything organic in my cloner because iv noticed it causes algey to go crazy and im to lazy to bleach my whole set up that often :P but this is just a preference more than a suggestion
make shere your mesherments are right! and ph plays a big role too...
not to hot! to hot will just mess everything up i had a stalk curl up so my clone looked like a J....you ever try planting a J -_-
also less is more when cloneing....only stick to clone nute and ph (if you have to) and be gentle when misting with nutes but DO MIST!

and this is what i lend my first 2 months of haveing my cloner