glue on window

i got a little glue on the winshield, can i sand with 2000 grit and polish with tamiya compound/ meguiars wax... or will it still be foggy?

You can start with 2000 grit, but it's still a little too coarse for the compound. I recommend using finer sand papers progressively, such a 4000, 6000, 8000, then use compound. That will erace the glue mark or scratch for sure.