My Lego washing technique involves a big soup pot and a metal colander in the sink. The Legos go in the pot along with a squirt of dish detergent and a lot of hot water. Swish-swish-swish and into the colander for a rinse.
The whole dripping mass goes down cellar where I have a screen door panel setup across some boards laid on top of a pair of sawhorses. Add a couple of fans and wait. Drying time is usually 24-48 hours depending on the weather.