Watering Cans Buy Now If your watering can has been lost or damaged, here is the replacement. Humidifier Pads Buy Now Change Pads TWICE a year. (1) 4-Pack of Pads lasts one year. PAD Treatment Buy Now "Humidifier Treatment", now "Pad Treatment" New name, same product. Your Piano Is A Large Investment Please have your Humidifier maintained by your Piano Technician during the annual or semi-annual piano service.