After getting my oil changed today I noticed this on my back window. I didn't use my wiper/washer on the rear so not sure what it is? I've never noticed the washer fluid looking this either. Also, they didn't wash it (as usual) so not sure what it is. Anyone?????

 

It sure looks like some of that aftermarket washer fluid, maybe they used it? Is that overspray on the window or is that from the "incident"?

 

That is wierd. Obviously by the picture, the wiper was used after the stuff was on your window. What is the first picture? The inside?

 

I believe the first pic is of the bottom of the rear door running onto the top of the bumper?

 

All the spray is that greenish liquid....
I've emailed some photos to the service manager inquiring about it.

 

Did it come off easily?

 

Yes Rhill... it is all over the back window and running down my back door to the bumper..

 

have you tried to use the window fluid and see what comes out?

 

It almost looks like copper sulfate. I don't know how that would get on there at the dealership. Maybe some kid that flunked out of High School Chemistry thought he was throwing acid on your Hummer.

 

Mine did that the first time I used my factory washer fluid. Since adding aftermarket wiper fluid it doesn't do that any more. Noticed it on my bumper step one day and freaked out[:-]. No worries though. Came right of and hasn't happened again.