You are soooo absolutely on target regarding the crystals and moisture absorption (and odor control). I've been doing a lot of homework on crystals over this past year, and have learned more than I ever thought.
Your tip is
right on!
Even keeping them in an area that gets less moisture will make them more effective. I know it's human nature (or is it just us guys?) to not read the info on the side of the box, but it turns out practically every decent crystal supplier recommends the stir thing.
Other things I've learned that help:
- if you have a partial bag (for instance the Fresh Step bags -- which are hard to seal back closed) -- find a way to seal as tightly as possible until you're ready to use them. Surprisingly if let to sit in contact with the air, they'll pull some moisture out of the air and be less effective.
- try to keep your box away from areas that get moisture in the air (washer/drier rooms, bathrooms with a shower, etc). Also, as mentioned here, good air circulation is very helpful.
- make stirring a habit. We keep our box in the downstairs bathroom (no shower) and I make it a habit to just pass through there and give the crystals a stir every other day. When I say stir, what I mean is find that area where your cat likes to pee (usually around the middle of the box) where you'll find the moisture collecting, and stir those wet crystals in, pulling the cleaner, dryer crystals in from along the sides of the box. I also occasionally push the cycle button and stir in those crystals that collect behind the rake (where it is in the "rest" position).
I've found this will not only increase crystal life, but will also reduce odors a LOT. Makes sense -- the crystals aren't as soggy and can do their job better.