It just so happens that yesterday afternoon I read Rhonda Wilson's column this month (February issue) in TFH on The Planted Tank that goes into how to bring plants home and introduce them to the aquarium. On the question of rinsing/washing, she states that she never bothers to dip them in anything, there is (in her view) no point. First, some of these concoctions can actually harm if not kill the plant, either outright or if the plant is exposed to the substance longer than a few seconds or minutes. Second, anything strong enough to kill whatever you're attempting to kill will likely kill the plant. Third, algae and snails cannot successfully be removed from the plant by such methods. Last, she like snails in the aquarium anyway
and doesn't see why one should not have them for the health of the system. B.