What to do if you are leaving for an extended period of time.

The toilet can be in these range of temps. However, when it is at an extreme cold (below freezing) we highly suggest you empty the toilet, including the solids bin so that it does not freeze because there is moisture in it. Yes, the medium over time can have mold growth because it is organic, we typically suggest to empty it before long trips away or agitate it periodically before use.