Possible Clues:

• Small amount of liquid, dampness
• Target of a dehumidifier
• For sure, I, Tom am a wet with this
• Emit sour, contaminated liquid
• Defogging target
• What hygroscopic surfaces attract
• Silica gel packet target
• Dampness - one's penetrated to the greatest extent by river
• More about the suit in the water
• Dew, for example