RECIPE #17 HUMIDITY SPRAY Categories: Garden, Fertilizer, Houseplants Humidity spray for houseplants: 1 qt water 1 twice used teabag 6 drops liquid dish soap 6 drops listerine 2 drops ammonia Spray with a pump hand sprayer. If there are soil insects, this solution can be poured into the soil. I find that if I use this regularly with dish soap I never have insect problems. I spray on plants as often as I want, at least once a day. -----