In addition to washing upon rising and before meals, period Jews also washed before praying and thus before going to bed. This practice was so universal as to be used by the Inquisition to identify converso Jews still practicing Judaism (see
A Drizzle of Honey). The rules of
kashrut (kosher) laid down in the Torah for ritual cleanliness enforced other specific kinds of hygiene as well.
In particular, the
mikveh, the ritual cleansing bath, was (and is) an important part of Jewish life. Women of childbearing age needed to visit the mikveh at the end of their menstrual cycle in for ritual purification in order to consort with their husbands; the mikveh was also used to purify people and things on other occasions.
Mikvot from the classical period have been found in archaeological digs at multiple sites, including Masada. Hanan Eshel summarized the rules for the construction of mikvot:
"A mikveh must hold at least 40 seahs of water (approximately 60 gallons). The whole body of the person or vessel to be purified must be totally immersed. And, most significant for our purposes, the water must be "living" water. That is, it must come directly from a river or a spring or from rainwater that flows into the pool; it may not be drawn. To meet this latter requirement, the rabbis permitted the use of an otter, a pool of living water that was connected by a plugged pipe to the main immersion pool. The main pool could be filled with drawn water (not qualified for use in ritual immersion), and when needed, the pipe between the otter and the main pool was unplugged, allowing the qualified, living water from the otter to come into contact with the water in the main pool, rendering it fit for immersions."(p. 43)
The distinctive nature of mikveh structures causes them to be regarded as archaeological markers of Jewish communities at classical and medieval sites. A mikveh dating from around 1150 has been uncovered by archaeologists in Bristol, England (Aldous, p. 27), and another in Cologne, Germany dates from around 1170 (http://www.thetravelzine.com/ejht3.htm).
Jewish privies
We know that the Jewish scriptures (Deuteronomy 23:12-13), requires men in military camp to have a separate latrine and to bury their excrement:
"You shall also have a place outside the camp and go out there, and you shall have a spade among your tools, and it shall be when you sit down* outside, you shall dig with it and shall turn to cover up your excrement.
* also translated "squat
Information from anti-Semitic stories and saint's lives (such as the story of St. Hugh of Lincoln recounted by Matthew Paris) as well as archaeological research suggests that Jewish families and communities had privies and/or cesspools.
Various sources suggest that the approved wiping method among Jews in period was scraping with a rock, and there are Jewish scriptural commentaries discussing what size of rocks are acceptable to carry for this purpose on the Sabbath, so it may be that people carried personal wiping rocks with them.