Humidify

The Humidify spell will fill all empty water-carrying vessels in a player's inventory with a single casting, including buckets, fishbowls, jugs, vials, watering cans, waterskins, and clay. A player receives 65 experience regardless of the number of vessels they have filled. Fishbowls and watering cans are not tradeable if they contain water.

Players travelling in the desert may find this useful so they can refill their waterskins without cutting cacti. Farmers on Lunar spells also find Humidify useful when farming multiple allotments, and may use Cure Plant and Fertile Soil hand in hand.

Casting humidify can also be a good way of training magic while making a fair profit. This can be done by buying empty vials from an NPC store such as the Shilo Village General Store or the Lunar Isle General Store and converting them into vial of water. Players need a steam battlestaff or a Tome of Frost and a Fire/Lava battlestaff for maximum effectiveness.

You can also use humidify to help save time when making soft clay by having the dry clay in your inventory, and casting the spell. This turns all clay into soft clay. "You can now convert clay into soft clay with the Humidify spell from the Lunar spellbook."

To maximise training with this spell it's best to use a fishbowl and set it underneath the spell spot (as if you were high alchemising) and to use the "f1" and "f4" keys to switch back and forth between spell and inventory. This makes it extremely easy to empty the fishbowl (since it is a 1-click empty) and cast the spell. Doing this is cheaper than high alching, but you gain no profit. It is at the same speed as well as alching since both spells give 65 experience. When you first hear the sound effect, it means that all vessels have be filled. If timed correctly you can bank or train with the fishbowl with ease.

A note about the above method: Windows users can save time clicking by using a function known as MouseKeys. XP users follow this direction to find the menu: Control Panel -&gt; Accessibility Options -&gt; Mouse -&gt; MouseKeys (turn it on). Vista users might have a harder time, but the process is best explained on the Microsoft website. What this does is that it allows a person to use the 5 key on their number pad as a left-click button. You can also set the mouse aside so the cursor doesn't slide around.

Humidify costs coins, or  coins if a Steam staff is equipped.

You gain 0 coin(s) per cast when using a water staff to fill 26 Vials

and 0 coin(s) per cast when using a steam staff to fill 27 Vials.

and 0 coin(s) per cast when using a water staff to soften 26 clay.

and 0 coin(s) per cast when using a steam staff to soften 27 clay.

Trivia

 * Using Humidify used to be a common spell used irrelevantly in the Soul Wars activity, when it was first released, until Jagex fixed it so that players trying to cast the spell receive the message: "You're here to crush souls, not to play with pretty clouds!"
 * Humidify will not fill a Bailing bucket.
 * Although you cannot cast Humidify in Soul Wars it is possible to cast it in Castle Wars by entering the portal with a filled water vial not an empty one.
 * Humidify can be cast inside Pest Control for the full 65 exp. One could do 500 life points damage and then cast humidify with a fishbowl to gain the normal magic exp and pest control points at the same time, yielding void knight armour or more magic experience as a reward.
 * Humidify used to make a loud popping sound, but it was removed because players complained it was annoying.