I use the 3%. If it is turning cloudy grey and muddy, you have large particles. When you add the H2o2 it is breaking the particles up, but if it is cloudy, you may have to ad the H2o2 a second time. Also, you can let it sit over night and by morning it should be clear. Nancy Thanks - this worked. Are the particles too large because I've brewed too long? I know the Distilled Water I'm using is very good quality. Claire
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