I am selling this because I have no use for it. I received it in December. [Plant-Based Safe Humidifier Disinfectant] Humidifier Disinfectant Liquid, Anti-Red Mold and Slime Liquid 300ml | Compatible with Ultrasonic and Evaporative Humidifiers, Maintenance Liquid, Safe, Fragrance-Free, Made in Japan, Cleaning, Cleaner The following is the product description: About this product ✅ Blocks red mold and slime for a long time! Plant-derived antibacterial and anti-mold ingredients prevent the growth of red mold and slime in humidifier tanks and the inside of the unit. It significantly reduces the hassle of cleaning and keeps your humidifier hygienic at all times. ✅ Safe design without chlorine or ethanol. It does not use quaternary ammonium salt or ethanol, which are commonly used in humidifier disinfectants. It is free of alcohol irritation and can be used with peace of mind in homes with babies and pets. ✅ Economical, high-cost performance design. Only 5ml is needed for 2L of water (approximately 400 times dilution). A 300ml bottle can be used 60 times. It lasts for about 2 months even if used daily, so you can keep your humidifier hygienic while keeping costs down. ✅ Odorless type allows you to enjoy aroma. Since the liquid itself has no odor, it is comfortable to use. You can also use aroma oils as you like, and enjoy the fragrance freely according to the season and mood. ✅ Numerous safety data for peace of mind. The liquid is almost neutral with a pH of 6-7, so it has little effect on humidifier materials and water quality, and is formulated to minimize the impact on the humidifier itself and the human body.