Question

The Rabbi wrote in response to one of the questions: "I must note that I do not understand the words of the halakhic decisors who speak also about wafers and other things that were dipped in liquid. On the face of it, it seemed to me that the enactment applies only to vegetables, since bringing them in contact with liquid renders them susceptible to ritual impurity. Other foods that were prepared by a person become susceptible to ritual impurity even without liquid being on them, and therefore I do not understand why one should wash hands when they are dipped in liquid. But I did not find a source for my reasoning, and therefore I would not rely on it in practice."
In the Mishnah Berurah it is written that the reason for washing hands for an item dipped in liquid is not because the food was rendered susceptible to ritual impurity, but because of concern that one will touch the liquid, and hands impart impurity to liquids making them first-degree impure… and therefore the Shulchan Arukh writes that if the liquids dried off, one does not need to wash hands. And this is also how Rashi and Rashbam explain the Talmudic passage in Pesachim 115, but I understand that the Rabbi's view is different.
Heaven forbid, I do not mean to disagree with the Rabbi, but only to ask practically with regard to Jewish law:
A) According to the Rabbi, would someone who is indeed careful to wash hands for an item dipped in liquid also need to do so for food that was dried off?
B) How, according to the Rabbi's reasoning, does one explain the Talmudic passage in Pesachim 115? I am copying it below.
May the Rabbi instruct us in his way, and so may it be His will.
 
 
"Rabbi Elazar said in the name of Rav Hoshaya: Anything dipped in liquid requires hand washing. Rav Pappa said: Learn from this that this lettuce must be dipped into haroset because of the harmful substance. For if you say it does not need to be dipped into haroset, why is hand washing necessary? He is not touching it! But perhaps actually I could say to you that it does not need to be dipped into haroset, and the harmful substance dies from the smell alone. So why is hand washing necessary? Perhaps he will dip it."
Rashi:
"Requires hand washing — because of the liquids, for the hands are second-degree impure, and anything that disqualifies terumah imparts impurity to liquids, etc.
He is not touching — his hand the liquid."