<p class="MsoNormal" style="text-align: left; line-height: normal; margin: 0cm 0cm 10pt;" align="left"><span style="color: black; mso-fareast-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-fareast-language: EN-GB;"><span style="font-size: small;"><span style="font-family: Times New Roman;">There is a method of kashering glass for Pesach, known as &ldquo;milui veirui&rdquo;. In this method the glassware is soaked in water for 3 days, changing the water every 24 hours. (see: Mishnah Berurah. 451:154)<span style="mso-spacerun: yes;">&nbsp; </span>Although I saw this method bring used when I was young, I can say that I have not seen it used during the last 50 years. It is very possible that due to the cheap price of glassware today, this method is rarely used today.</span></span></span></p>