actually you want agitation. you need to knock off those trich's and the colder the water the better so those doing it by hand might want to invest in a paint stir attachement for the drill or a long beater/mixer (but paint stirs are much easier to find and far cheaper) and stir in the bucket, without the bags. then run it through the bags in a separate bucket. this saves a lot of wear and tear on the bags. when done i run the bags through the washing machine on gentle cycle then hang dry before putting them away...ready for the next harvest!