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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, bowls 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 spell 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. 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. Players need a steam battlestaff for maximum efficiency.

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 cast the spell repeatedly, since the fishbowl has a 1-click empty. It is at the same speed as casting high alchemy since both spells give 65 experience. Note that casting high alchemy is usually a lot cheaper with potential profits when alching the right items. Casting Humidify on a fishbowl and emptying it again will lead to a guaranteed 100% loss. When you first hear the sound effect, it means that all vessels have been 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. Experience users follow this direction to find the menu: Control Panel -> Accessibility Options -> Mouse -> 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.

ProfitsEdit

These tables assume all items are bought on the Grand Exchange and sold afterwards for guide price. All staves may use equivalents (eg. Mindspike (water) instead of Staff of water). A large rune pouch in the ammunition slot may be used to store runes for additional inventory space.

This table shows the difference of the price between filled and empty vessels. After subtracting the cost of the cast, that would be your profit.

Vessel filled Difference in price between filled and unfilled vessel Difference×28
Bowls 75 2,100
Buckets 20 560
Clay 82 2,296
Jugs -93 -2,604
Vials 39 1,092
Waterskins 135 3,780

This table shows how many vessels you may fill with one cast if you use various equipments.

Casting method Quantity of vessels able to be filled
Just normal runes 25
Steam runes 26
Staff of water 26
Staff of fire 26
Steam battlestaff 27
Small or large rune pouch, or Wicked pouch 28

Here are some specific examples:

Method and quantity Staff equipped Profit
Filling 25 Vials of water None 443
Filling 26 Vials of water Staff of fire 532
Filling 26 Vials of water Staff of water 530
Filling 27 Vials of water Steam battlestaff 619
Making 25 Soft clay None 1,518
Making 26 Soft clay Staff of fire 1,650
Making 26 Soft clay Staff of water 1,648
Making 27 Soft clay Steam battlestaff 1,780
Filling 25 Waterskins None 2,843
Filling 26 Waterskins Staff of fire 3,028
Filling 26 Waterskins Staff of water 3,026
Filling 27 Waterskins Steam battlestaff 3,211

CostEdit

InputCost
3Water rune1Fire rune1Astral rune520
Combo runes
1Fire rune1Astral rune3Mud rune2,320
3Water rune1Astral rune1Lava rune1,133
3Water rune1Astral rune1Smoke rune1,166
1Astral rune3Steam rune2,642
1Fire rune1Astral rune3Mist rune2,554
Staves
1Fire rune1Astral runeStaff of water484
1Fire rune1Astral runeMud battlestaff484
3Water rune1Astral runeStaff of fire470
1Astral runeSteam battlestaff434
1Astral runeElemental battlestaff434
1Astral runeMystical staff (75)434
3Water rune1Astral runeLava battlestaff470
1Fire rune1Astral runeAvernic wandTome of frost484

TriviaEdit

  • Using Humidify used to be a common spell used irrelevantly in the Soul Wars minigame, when it was first released, until Jagex changed 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.
  • After an update on 5 July 2011, humidify can no longer be cast in Castle Wars. Players attempting to cast the spell would receive the message "Please go somewhere else if you want to do that."
  • Humidify used to make a loud popping sound, but it was removed because players complained it was annoying.