My family separates the florets from the stalks, puts the florets in a bowl of salted water, let it sit for 10 minutes, then discards the water, and refills the bowl, adding some vinegar and a small amount of dish detergent to the water. The first soak dislodges some bugs, but more are dislodged on the second soak. The final step is to discard the water, and then pour hot, but not boiling, water over the florets. If bugs are still turning up, then we just use the stems.
