I just did a warshing for the first time this weekend. I boiled a big ass pot of water.....ok, about 2 liters, and let that cool.
I took 2 different bottles, one Gatorade and one cranberry bottle, and used those as my washing vessels. I poured in about half of a big ass Gatorade bottle of the cooled/boiled water, and let that mix with the cake in the bottom of the carboy.
Poured as much as I could fit into the Gatorade bottle, and let it settle. After 10-15 mins, you could see the hops in the bottom, and the beer on top. So I poured the top of it into the half full (of cooled/boiled water) cranberry juice bottle, and let that settle for a bit. Did the same thing, transfered the top part back into the Gatorade bottle, and let that sit overnight.
I can see the little yeasties, and I will make a starter to grow more of the yeast. I'm just experimenting, so we'll see how it goes.