I got this product and while it worked, the delivery system of the spray bottle did not. And trying to tilt your head back just produced a huge over amount in a big flow but not a proper spray. I called to get a replacement bottle which I was told was coming. When it did not and I called again to find out about it, and after much investigating I was told it was because it was out of stock when they tried to reorder. However nobody ever notified me of this. They ultimately found it at another warehouse and I received a new bottle which malfunctioned in the exact same way. so I've struggled to use it in hopes of getting the proper dosage. Two out of Two malfunctioning spray bottles of delivery of a decent product is pretty frustrating.