Previously, I simply swished new chains in Simple Green HP to get anything factory-supplied off prior to waxing; unsure if that has been really effective but I really have not had problems. I read about, and bought a bottle of Silca chain stripper and pre-wax treatment. Doing three chains this AM, I am immersing the Silca product in the ultrasonic cleaner, the bottle's contents just barely covers the chain. Max time on the machine is 6 minutes, I am doing 2 sessions per chain. Uh, not sure how I'll be able to tell the results objectively.