Best clear vinyl plastic window cleaner?

[Captain Larry-DH]

I’ve used Plexus cleaner in the past for cleaning clear vinyl windows and love how well it works, but it’s become very expensive. I‘m looking for an alternative plastic window cleaner that cleans well, doesn’t leave visible film or streaks (and ideally provides UV and anti-fog protection).
Suggestions appreciated.

 

[Davidasailor26]

For Strataglass we like this -

Haven’t found anything especially good for crazing and fogging of Makrolon though.

 

[rgranger]

What ever new product your try, I would suggest testing it on a small courner of your window before going whole hog. I've seen some really bad results down on the docks.

I've even seen really bad results when cleaning other plastic products as well. For example, where I work, we installed a VERY LARGE white board in a conference room. Board plust installation was $1800. And Windex stripped some coating off of it and now the markers leave "ghosting" imprints. It was a very expensive lesson in why you need to read the product guidelines.

 

[Roland5048]

why you need to read the product guidelines.

In a past life I was a teacher. When we switched from blackboard to whiteboard it was a Godsend except when I or a student accidentally grabbed a permanent marker. If you have ever done that, you know what I'm talkin' 'bout.

 

[thinwater]

I tested a bunch on my cruising cat. Also on test panels over a 4 year period. See Practical Sailor.

Star Brite View Gard. So easy to use, and very effective.