Before you consider trying this, consider the following. If you are not comfortable with any of below warnings, please don't attempt this.
Calcium Chloride is mildly hazardous. Although it is used as a food additive, it also acts as an irritant on the skin because of its aggressive water absorbing properties. You also don't want to get it flying into your eyes or ingest it...
Always wear safety gloves and safety goggles.
Keep your working area well ventilated.
Store your chemicals so that they are safe and out of children's reach.
Boiling of the solution will involve heating up the substance to temperatures exceeding those of a typical deep fryer: dangerous!
Some desiccant dehumidifier brands, like "kiwi fresh" contain a fragrance. Try to avoid heating up those and stick to those brands that contain the pure, odourless stuff.
I will not take ANY responsibility for accidents and/or injuries that occur while trying or as a result of this instructable!
Find out more about calcium chloride here:http://en.wikipedia.org/wiki/Calcium_chloridehttp://www.buzzle.com/articles/properties-of-calcium-chloride.html