I would add a few drops of
hydrogen peroxide to kill any bacteria growing in the humidifier water and test the ppm and ph the first few times I used it...maybe, or I might just stand at a closet door staring 1000 miles away and then stash the peroxide in the cupboard behind the corn chips while thinking of something else so that I can not for the life of me remember where I put the peroxide until I go to make some nachos, at which time I then put the peroxide on the kitchen table where it stays so I will be able to find it...right next to the deoderant and cordless drill.