By Rabbi Yair Hoffman for 5tjt.com First there was the icebox.  Then came the expensive refrigerators with the poison gas.  And then came freon based refrigerators.  And the world changed for the better. This Thursday before Shavuos, we will all be making an Eiruv Tavshilim.  Generally speaking, we use an egg and a Matzah for … Continue reading Should New Developments Affect the Way We Do Our Eruv Tavshilin?