1. Soak in soapy water.  I use All Free/Clear laundry soap – I figure if it’s good for synthetic fabrics it should be good for plastic bricks.
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2. Transfer to mesh bag and rinse in bathtub.  I had to do this in three batches, I had so many dirty bricks.
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3. Use laundry basket, lined with towel, to carry to living room.
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4. Dump out on towels on living room floor, with fan blowing on them.  Luckily I live in coastal California, so the humidity is low and they actually get dry this way.  I’ll stir them periodically, but they’ll be dry enough to sort and put away in a day or two.
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Anyone want to come over and help me sort?  I’ll give you free pizza!