This kit contains crystals to fill your humidifier 4 to 6 times. Unused, dry crystals retain their strength for more than 5 years. One replacement kit is sufficient for several years.
If you look inside the humidifier, it should look like cottage cheese. If you see standing water, you need to replace the crystals. Instructions: Fill a 0.15 cc spoon with crystals, add the crystals to the humidifier, fill the syringe with distilled water and empty the syringe into the humidifier until it is completely filled.
At the start of the spring, we recommend to empty and clean your humidifier. If you do not remove the crystals in the spring, the humidifier will shrink and dry up making the crystals unusable.