I was inspired to follow up on this question that asks about cleaning Torah scrolls.

My shul building is about 90 years old. The Aron has 10 Torah scrolls - only 4 of them usable. This ark is opened once weekly (Shabbat only) on average. Calculating things based on the annual reading schedule, one is used regularly; a second is used about once every 3 - 4 months (Shabbat Rosh Hodesh, holidays, etc.) and the other two are "rotated" when reading schedules get "close" (e.g. Pesach has readings from various places, so I may use one of the other 2 so that I can keep one of the first two in place for future annual readings.)

I mentioned all this because I gather that the less a scroll is used, the more likely it will develop a musty smell and, perhaps, mold? (I haven't personally seen mold on a Torah, but, I guess it can happen?)

The ark is opened only once per week, on average. The shul gets very damp and musty esp. in the summer when it is hotter and more humid and the A.C. is not on in that area.

Given all these factors, besides having the A.C. or a dehumidifier running in the shul (it's a huge space and the shul can't afford these solutions), what other ideas can be done to reduce the musty smell and prolong the age of the parchment?

Are there cleaners / sprays or something like that that can be used? Would the 6 passul Torahs sitting in the ark be a major contributing factor to possible mold , smell and humidity? Should they be removed from the ark, permanently (we do have closets to store most if not all of them)? Any other ideas?

  • A dehumidifier would help
    – Dude
    Commented Oct 11, 2018 at 17:54
  • 1
    @Dude maybe even actually put it inside the ark.
    – mroll
    Commented Oct 11, 2018 at 22:37
  • @mroll That's a pretty obvious answer. See my 5th paragraph. My shul isn't going to do this option. The main shul where they keep all these Torot is closed the entire week and no electricity will be used, there. It's an old building, so it's not as if they have zoned electrical wiring that they can dedicate power to running fans or a humidifier in the ark. I'm asking what else may be possible.
    – DanF
    Commented Oct 12, 2018 at 1:18
  • There are no power outlets in the shul? I would find that surprising. One probably won't be in the aron but an extension cord would help
    – Dude
    Commented Oct 12, 2018 at 12:13
  • @Dude and any others following this - I think I've made it clear that the upstairs shul is open only on Shabbat & holidays, and they will not run any electricity in the shul area. Please avoid further discussion on this point, as I will just ignore it.
    – DanF
    Commented Oct 12, 2018 at 17:34

1 Answer 1


One thing I didn't mention when I posted about cleaning the Torah scrolls is that the sofer who told our Rabbi how to clean them also recommended airing the scrolls on a regular basis. Again, something we'd never thought to do. The Rabbi says the sofer literally unrolled the Torah out on a long table (we had 4-5 8' tables end to end for this project (two sets, one for each of our scrolls)) then brought the end of it up to fold the scroll over itself so it was sticking up in the air.

He recommended leaving it for a couple of hours before re-rolling, and doing this regularly so that each part of the scroll gets a chance to air over the course of a year. (I do not know what the recommendation is for how many times a year each section gets to air.)

The logistics of this can be easy or really hard depending on if you have access during the week or during non-service hours on Shabbat, what space you have to unroll the Torah, security, etc.

My guess is that even allowing a rolled up scroll to be out (I'd try to stand it up if possible...maybe even build a stand to do this) in the main room without the cover will help air it.

You might consider different covers too. If the cloth is thick or made of synthetic fiber, it won't breathe as well. Also be sure to change covers and wash them (if possible). For example, we do this once a year at our shul, as we have a special High Holy Days cover.

There are no sprays. That's something I can attest to as I do a lot of work helping people with chemical sensitivity and mold sensitivity overlaps strongly. You can cover up the smell but you can get rid of the underlying problem (and it is something that can damage the scroll so you really don't want to just cover it up).

If there is mold in the ark itself, then yeah, you have to deal with it. The best way to get rid of mold is to physically remove it. So wiping. Use a basic cleaner (I'm a fan of Biokleen as it's natural, doesn't leave lingering scent, and really works) and lots of rags. Is there carpet or other fabric on the floor/walls/ceiling of the ark? Or curtains? I'd consider completely replacing it (or at least removing and washing, if possible).

You might think using bleach will kill mold, and it can to some degree, but studies show that plain white vinegar works even better. Make sure not to leave water/dampness. Wipe down the inside of the ark with vinegar after cleaning (don't forget the inside of the doors). Let air very very well.

I'd also recommend ozone, if you have access to a machine. It does require electricity so I hear you that this is maybe not possible. But it would be a one or two-time thing for a few hours. Never run it when people are present. Run in the empty ark for a couple of hours then turn it off (while holding your breath) and air everything for another couple of hours. Ozone does not kill mold but it will oxidize some of the byproducts of mold that can cause damage/smell/health issues. You can ozone the scrolls themselves but ozone oxidizes whatever it touches (like the inside of your lungs). A small amount is unlikely to damage anything but, with scrolls that might be hundreds of years old, I wouldn't recommend taking the risk. But if you have an unwashable cover that isn't an antique, you could ozone that.

There are materials that suck up moisture (like the little silica packets in vitamin bottles) that you could place in the ark. I know there are versions made for spaces that size. You'd have to replace or recharge (remove moisture in an oven or the sun) periodically, but this could be an affordable no-electricity help to reduce humidity levels, though I'd research them to see how well they work in your climate and situation.

I would very much like to hear what does and doesn't work for you.

  • Thanks. VERY useful info. I'll analyze this and see if I can recommend something to the rabbi and shul board.
    – DanF
    Commented Oct 12, 2018 at 17:37

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