I put a scoop of the powder (using my bare hands, I might add) in the drain and dribbled about 4 ounces of warm water over it. It foamed up a pretty blue. I understand the foam goes up, down sideways, whichever way the gook in the pipes goes.
We left it in there for about two hours and then ran the water from the faucet. The water ran freely, no longer clogged, and the mildewy smell went away!
I really love this stuff because I've learned that it continues right down the drain, putting the good bacteria into my septic system. That's really important since we recently spent a LOT of money installing an entirely new system and it's important to keep that good bacteria in there to protect our investment by maintaining it properly. Plus, it's safe on whatever type of pipes we have - even PVC!
That's my Norwex Drain Care Story. What's yours?