As stated earlier keep the Drew Estates and "Ass-ids" away from non funky cigars.
AS to the polypro solution, it also depends on what kind of humidification device you have. Many of the more inexpensive humis use "oasis" type foam to hold the liquid. They say that by treating the humi with the solution every six months or so (in lieu of water) it will help keep the foam absorbent. I've seen many humis come into the shop where the foam just wouldn't take any water, and was bone dry. The foam was shot. The solution helps the foam last longer. Then again, if you have a sharp blade, and any sort of dexterity, you can just get the foam from a craft store for $.99 instead of paying $15 for the "magic" solution.
FWIW, we also sold a TON of those "humi-tubes". Clear plastic tubes with polypro "rocks" in them. No messing with distilled water. Just use tap water. These are paricularly nice for cheap or travel humis.
Also, do NOT use tap or bottled water. We had an arrogant SOB customer with more money than sense. Had an Elie Bleu humidor, and since he was so "special", he thought it would be even better to use Evian instead of distilled water. All the extra minerals etc in the bottled water wreaked havoc on his humi.
Generally the first time "seasoning" the humi (wipe down interior surfaces with paper towel soaked with distilled water, "charge" the humidifier, and let it sit closed overnight with NO cigars in it. If you put the cigars in right away, the humi will suck all the moisture out of the cigars. It needs to "stabilize" before you put stogies in.) we would charge the humidifier with the solution. That way you just use distilled when you need to add moisture. Every six months use the solution.
Rich