Q. Do women’s rings need Haga'ala before Pesach, since they touch the Chametz food during the whole year? How about the maids rings in a hotel where they prepare the
food?
A. Poskim differ. Some maintain that if they are cleaned very well it is sufficient. Others opine that after they are cleaned they shouldn’t be used for 24 hrs. before Pesach. (Kovetz Halochos H. Pesach 13: 8, p.103).
In hotels indeed it is an issue and the mashgichim (kosher supervisors) should be careful that the food workers wear gloves constantly as is often required by law.
Horav Shlomo Mille’rs shlit”a opinion is that it is proper to do Hagala on them. The Rov quotes Halichos Shlomo (3: n. 51) that in the home of Horav Shlomo Zalman Auerbach Zt’l, they would rinse also the rings in fluids that are strong and sharp cleaners (contain ammonia or similar strong solutions), but not in hot water as it may damage the stones of the rings. (Moadei Shlomo 2: 6).
See also Madreichei Kashrus of the Eida Hachareidis, Sefer Hagolas Keilim 13 n.115, Ohel Yaakov pg. 47 quoting Horav M. Bransdorfer Zt”l.
Rabbi A. Bartfeld as revised by Horav Dovid Pam, Horav Aharon Miller, Horav Chanoch Ehrentreu and Horav Kalman Ochs Shlit'a.