Kerotin Hair Thickening Spray

So I don't know if its my hair, my shampoo/conditioner, or styling product but when my hair is wet, trying to brush my hair is impossible which is a bad bad thing for my thin fine hair. It's almost "sticky" so if I have to style my hair by blow drying it - this product is a "no" for me. However, once dry, my hair can easily be brushed and does FEEL fuller. So on the day's I don't need to go anywhere and can just let it air dry, it's fine. Having said all that, jury is still out whether it actually makes my hair thicker or if it's just the product filing it out.