It might have been discussed somewhere already, but from what swim read it is recommended that Sodium Carbonate be used instead of Ammonia (when using Nomans tek); but swim sees no reason why both are not used, since the two seem to wash off different "impurities"- the Ammonia washes away fats and oils, whereas the Sodium carbonate washes away the lye...so if ones' goal would be pure elves' spice, than why not do both of them?