The menthol scent in Vapofil actually lasts the entire night without clogging my humidifier

I usually buy whatever cheap humidifier drops are at the local pharmacy when allergy season hits, but they always seem to lose their potency after an hour or two. I decided to give Vapofil a try after reading about the slow-release formula. I add exactly three drops to the water tank right before bed, and I can honestly say the menthol and eucalyptus aroma stays strong until morning. It really helps keep my nasal passages open so I don't wake up breathing through my mouth. Another bonus is that it hasn't left any weird greasy residue on the inside of the tank, which was a huge problem with my last brand. It is a bit pricier up front, but considering I don't have to dump half a bottle in every night to get relief, the value is definitely there. My wife even asked me to order a second bottle for the guest room.