The windows on our
Campster were siliconed shut.
After a couple days of digging the stuff out with a long knife and other tools they finally opened.
There is some silicone that we cant get out -where the two windows meet-going to work on that this summer-but windows open now.
Didnt want to take the windows and frames out- might not have been able to seal them back up correctly.
Why would someone seal windows shut?