I use this for a nightguard, realistically about once per month. I put it in a glass and let it soak. I do not like the smell of this stuff, BUT it rinses off well enough for me to even use the glass for a drink of water after the fact. What I do is, after I use the Efferdent in a glass with my nightguard, for about 30 minutes up to overnight, I then dump it out, rinse both, and then I soak the nightguard in plain water for a few more hours (because I set it and forget it, and I do not use a timer--I just do it when convenient). At that point, my nightguard does not have any funky taste to it. I'm guessing that the second soak in water is not necessary, if you scrub it with a toothbrush. I just do this because it's easy and eliminatess all the smell/flavor of the Efferdent.