I am a regulator repair tech. I have been told by the manufacturers not to soak, just rinse. What I do is add simple green to the rinse tank, pull back the house protectors and shake the second stages around in the rinse tank leave the hose protectors pulled back for drying. Shake the water out of the seconds. Place the first stage back on a tank and shake and purge the seconds to get the water out of the seconds. Let dry and store in a cool area. Stay safe and enjoy diving.