Chapter 12
Washing Dishes and Cleaning the Table on Shabbath and Yom Tov
WASHING DISHES
5.a. The use one is permitted to make of soaps, wash powders and other dish-cleaning materials depends on whether or not they have been boiled in the process of manufacture.
5.b. Most cleaning materials, other than soap, are not boiled and are consequently subject to the rules set out in this paragraph.
5.c.1) On Shabbath,
a) they may be dissolved in cold water, but
b) they may not be dissolved in hot water, even in a keli sheini (as defined in chapter 1, paragraph 2),
and
c) hot water should not be poured from a keli rishon (as defined in chapter 1 paragraph 2) onto the solution produced by dissolving these materials.
2) On Yom Tov,
a) they may be dissolved, even in hot water, in a keli sheini, but
b) it is desirable to refrain from dissolving them in a keli rishon, whether or not it is standing on the fire, although
c) one may be more lenient in permitting hot water to be poured into a solution of these materials, even from a keli rishon.
