you can start with a 5 gal bucket (or something about that size.. some cat food comes in buckets like this, or sometimes you can get them from deli's)
and a brand new (LABELED) plunger.
fill bucket about half way with water (in the bath tube or out of doors.)
'aggitate' with plunger..
Use hot water/cold water/hot water(shock treatment)
it goes pretty quick!.
be sure plunger is stored seperately (with knitting supplies) and not in bathroom/or under kitchen sink!)