I've been trying something a little different in the last week or so. I soak my grains first in a weak bleach solution. I try to remember to only soak them this way for like the first 30 minutes to an hour but often I forget until the next day that I have grains soaking... anyway... I use a lot of yogurt containers and this is what I soak them in. After draining, dumping them into a colander and rinsing well, I put them back in their soak container (after rinsing it out really well) and leave them there. They seem to like weight on top so I stack my yogurt containers with the soaked seeds and for the top one, I just put a couple inches of water in it for the weight. I take and rinse daily. Then, once the grains have lots of nice little rootlets growing, I put them into a pan that only has one hole in the corner for drainage. I rinse really well with lukewarm water. You can see bits of stuff come up with the water. I rinse until I don't see this happening any more. I'm thinking that milky stuff that comes off might be either just starch or maybe some mold spores that were trying to get a foothold in my pan. There is also something else that comes up, it is more chunky but still little tiny pieces that float... I wash them all away.