That's weird, can you explain how you use it?
I think a lot of people that find "the juice" not working with them use it with other products. Or they apply it to damp hair and then give up when their hair dries up hard. Also if your hair is not clarified and you condition wash a lot or use a lot of products, it will not penetrate.
Otherwise by virtue of it being water-based, it should not just sit on hair. It wets hair the way water does. The tricky part comes in that it may make your hair feel dry later if in very dry climate due to the glycerin, but as for SITTING ON HAIR, I just don't get how it can unless your hair is coated in a serum.
ETA: BTW, I'm talking about the spray, not the gel. I can sorta see the gel just sitting on hair. The no-drip moisturizing activator spray on the other hand would have a hard time just sitting on hair.