I have a 4Runner 4th Gen 2005 limited V8. I noticed it is difficult to clean the inside of the side windows. They are tinted, so I do not want to use an abrasive on them, but they are blurry and it looks like their is thin plastic film on them. How can I clean them without scratching them? I've used Window Cleaner, water and vinegar, and Windex. I was just the rear side windows but now it has creeped to the front side windows. I do transport my two greyhounds all the time in it. Would that have anything to do with it. Thanks in advance for your help.