If you are using a sponge/floral foam, use the solution. My Humidor came with a 50/50 glycol solution and I only use it every 3-4 months. When humidity drops, I refill the sponge/floral foam with distilled water (prior to the 3rd or 4th month). Since the solution is 50/50 or 60/40, whatever, the water will evaporate and leave the glycol percentage. Therefore, you will need to balance it with distilled water.
So, don't use the "solution" but every 3-4 months (some say up to 6 mos). In between, use distilled water. Once you finish using up your solution, buy beads.
I actually still have half a bottle left of my original solution. I use it every now and then as a back-up to my beads. The beads can only hold/release a certain amount of moisture, so I have floral foam as back up........but in reality, the beads do the job right.
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