Follow the Instructions
I bought this for my team having recently been required to enter an industrial environment requiring safety glasses.  I cleaned, then treated my glasses per the instructions, letting the fluid dry, then wiping clear.  My glasses now only fog in the most unfavorable conditions of low temps with high humidity, which is totally reasonable. My right hand man didn't see the instructions and just sprayed and wiped, his results were not so favorable.  Be patient and this product will serve you well.
Rating: 5 stars