Can you tell me how to apply RainX without leaving a windshield with smears. I have cleaned and cleaned the windshield and finally gotten rid of the smears from my first application, but I think I took off all of the RainX. I applied it as instructions. That is, wipe on with a clean cloth, let dry to a haze and then sprinkle with water and wipe off with a paper towel. When driving into the sun the next day, it was like looking through a cloud. any suggestions?

okay so the car was towed in due to crank no start. First pulled the plugs as owner stated that they can't remeber when plugs where changed last. so of course pulled plugs and they were toast. prolly 50k miles plus on those plugs. So i changed the plugs and went to fire it up and it ran real rough chugging so I put new wires on it even tho the ones on the car didnt look very old. and still have same issue starts but runs real rough. At same time I noticed that the car was leaking coolant so I did pressure test and noticed water pump was leaking so replaced that and now the car cranks over but doesn't start. Did a compression test on all 4 cylinders and all of hem are roughly 170 or better nothing over 180. I have tried putting starting fluid down throttle body but acts like it wants to start but will not. all 4 cylinders do have spark. any ideas. No check engine light. Scan tool shows cats at 100% and also show OL meaning something is showing open if I'm not mistaken. Ideas on fixing this problem.