I use warm/hot water, maybe 20 ounces, knead the heck out of it until the ball of kava doesn't feel like play dough anymore. It'll start to feel like a ball of straw. I then do a second wash in a small amount of water for maybe two minutes. Finally I add both washes together. 4-6 rounded tablespoons makes about 32 ounces of finished grog. I then add a tray of ice to quickly cool it down. I split that into maybe 4 or five drinks which I drink one about every 10-20 minutes.
Everyone does it somewhat differently in regards to dosage, strength, and length of sessions. Also different varieties can change how you consume. Tongans are generally uplifting and shorter lived, with less of a chance of nausea. Just be forewarned, too much too fast can sometimes ruin the experience. I'm glad you enjoyed your kava. Boiling/straining makes for a slimy session, but it works! If you're gonna go that route, water it down to desired consistency and ice it down nice and cold.
If sediment doesn't bother you, be sure to stir your grog before each shell.