RTFM error! Please read the instructions more carefully!
It clearly is written in the instructions, that even IF there is not enough fluid in the bottle, just fill it up with plain water. The chemical inside will be enough for applying the product.
No where in my instruction sheet said to fill up the bottle if it ran out. BTW my bottle was only 1/2" diameter so I must have gotten the wrong bottle in the package and perhaps instructions! Glad I'm exchanging the shield tomorrow at Best Buy and giving it another try! I'll look for the comment about filling up the bottle and see if the bottle is the 1.5" diameter version.