It looks like water did this. Is there a way to get it off?

[bottomsup]

Is that glue or something from underneath?

 

[untilcomplete]

I used this (https://amzn.to/2SjptV6) to get the water stains out after i got the windows tinted. worked perfectly.

 

[jmp3000]

Something like dawn free and clear diluted in warm water plus a sponge may also work. This is what I used to clean up after a tint install and I was happy with the results.