Humidify

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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 should use a staff that provides unlimited Fire and Water runes (such as a Steam battlestaff) for maximum efficiency.

Profits[edit | edit source]

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 9 252
Buckets -129 -3,612
Clay 67 1,876
Jugs -14 -392
Vials 60 1,680
Waterskins 408 11,424

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 779
Filling 26 Vials of water Staff of fire 969
Filling 26 Vials of water Staff of water 915
Filling 27 Vials of water Steam battlestaff 1,105
Making 25 Soft clay None 954
Making 26 Soft clay Staff of fire 1,151
Making 26 Soft clay Staff of water 1,097
Making 27 Soft clay Steam battlestaff 1,294
Filling 25 Waterskins None 9,479
Filling 26 Waterskins Staff of fire 10,017
Filling 26 Waterskins Staff of water 9,963
Filling 27 Waterskins Steam battlestaff 10,501

Cost[edit | edit source]

InputCost
3Water rune.png1Fire rune.png1Astral rune.png702
Combo runes
1Fire rune.png1Astral rune.png3Mud rune.png4,431
3Water rune.png1Astral rune.png1Lava rune.png1,404
3Water rune.png1Astral rune.png1Smoke rune.png1,625
1Astral rune.png3Steam rune.png3,314
1Fire rune.png1Astral rune.png3Mist rune.png4,179
Staves
1Fire rune.png1Astral rune.pngStaff of water.png645
1Fire rune.png1Astral rune.pngMud battlestaff.png645
3Water rune.png1Astral rune.pngStaff of fire.png572
1Astral rune.pngSteam battlestaff.png515
1Astral rune.pngElemental battlestaff.png515
1Astral rune.pngMystical staff (75).png515
3Water rune.png1Astral rune.pngLava battlestaff.png572
1Fire rune.png1Astral rune.pngAvernic wand.pngTome of frost.png645

Update history[edit | edit source]

The update history project is a work-in-progress – not all updates to this topic may be covered below. See here for how to help out!
  • ninja 21 September 2020 (Update):
    • Replaced various instances of the word 'Inventory' with 'backpack' in Lunar Spell descriptions and info/error messages.
  • patch 5 July 2011 (Update):
    • It is no longer possible to humidify during Castle Wars.
  • patch 21 September 2010 (Update):
    • The Humidify spell no longer causes sound for other players.
  • patch 10 August 2010 (Update):
    • Adjusted some of the humidify animations.
  • patch 7 October 2009 (Update):
    • Fixed a bug when casting the lunar spell Humidify.
  • patch 2 September 2009 (Update):
    • It is no longer possible to cast the Bake Pie and Humidify spells at the same time.

Trivia[edit | edit source]

  • 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.