I use a bunch of supplements whose containers include those little packets of desiccant to keep the tablets in good condition. I would like to re-use the packets to keep crackers crisp. When I open a package or box I put the crackers in a jar with a tight-fitting lid, but they typically get stale before I finish them. Crackers have oils, salt, and other ingredients that vitamins and other supplement tablets don't. Can I safely use the desiccant packets in the cracker jar?