As long as you put propylene glycol in it or there's PG already in your humidifier, club soda would be okay.
No , the antifreeze contains chemicals that would contaminate the cigars and the humidor .
I suppose that isopropyl alcohol evaporates too quickly.
Throw away the directions that come with the humidor. Use the gel or beads. Do NOT use a dial hygrometer. Get a digital hygrometer. Leave it a couple days with no cigars. You are now good to go. This method will save you ALOT of pain. If you have a large humidor get one of the electric units that self regulate and double check it with your digital hygrometer.
cimoke humidor very nice.
I store my cigars in a humidor to keep them fresh and at the proper humidity level.
Nine cubic feet? Wow. Are you building this humidor yourself?If I was building a humidor that big, I would get about two square feet of the foam florists use to arrange fresh flowers in and cut it into chunks. Soak each one in 50/50 propylene glycol and distilled water, and place them in various positions in the humidor. This will help the humidity get into the atmosphere of the box evenly.
No. The carbon dioxide gas dissolved in club soda makes it acidic. Baking soda is basic, and the pH of your dish will not be balanced.
Yes. Just make sure it is a medical grade sterile water. Don't use boiled tap water. Ideally you should use propylene glycol (PG) as well.
club soda
Once you have mold you pretty much need to start over. Every cigar in the humidor will be affected. (infected) You could try leaving the humidor open for a week or so and giving it a light sanding and re-humidify it with out cigars for a week or two, then test it with some expendable cigars to see if it ruins them or not. Use a digital hygrometer and the crystal jars not the sponges with water. It make it easier to regulate and keep the mold away. If the humidor is a cheapy, I would toss it and start over.
baking soda, club soda, baking powder, strawberries, and ovaltine
No, but you can use club soda instead.