[Avodah] Mouthwash on Tisha B'Av (was: 25 hour fast)

[Yosef Gavriel Bechhofer]

From: Doron Beckerman <beck... at gmail.com>
Date: Wed, 17 Jul 2013 16:32:35 +0300
> RYGB's link to his blog relates only to the achilah aspect, but does not
> relate to the rechitzah aspect of using mouthwash. It is well-known thatR'
> Moshe Feinstein forbade using mouthwash on account of rechitzah (seeR'
> Eider's kitzur hilchos bein hametzarim, citing RMF  to this effect).
...

I was referring specifically to someone experiencing dry mouth. That is
a makom tza'ar. It is not for the purpose of pleasure. Just as applying
deodorant is not considered sichah, so too using a mouthwash (or even
water) for dry mouth would not be considered rechitzah.

See also http://www.dinonline.org/2011/08/14/mouthwash-on-tisha-beav

KT,
YGB

P.S. Just to pick a nit, 9 Av is not a 25 hour fast. Even according to
RMF it is 24 hours and 50 minutes. According to the Ba'al HaTanya it is
more like 24 hours and 33 minutes.