Luckily mold is rarely an issue in the dry areas I am.

A dry match. 

The combination of the soil and drought is not a good for the foundations in the area.

We don't want to use up all of our dry powder chasing a 14% cash on cash return when similar opportunities may yield much higher returns.

There are also good suggestions in this thread but more of your needs or desires would be necessary before someone could give you a cut and dried answer as to which method is better for you.

Just mix small batches so it doesn't get too dry.

Sometimes the traps will dry up allowing sewer gas into the house.

Put fans on it to help it dry and check it to see if the smell is gone.

The basement is dry and shows no water damage.This is a fun, humbling process as I've enjoyed success both in corporate and as a Tech consultant.

When marketing leads start drying up - perhaps it is time to change the way you are marketing for business.