Was thinking,,,,"possibly" pour some alcohol/de-icer like we use on air-lines-trucks.
but odds are it won`t get to where its stuck.

I had an issue like this with a sunroof 30 years ago. Found a indoor self/car wash stall. closed the door and waited............

70` Cuda`,440 6BBL Jerico,Dana 4.56 Still on 93 Pump Gas
9.87 @ 136/1.31-60ft.`09 Mopar Nationals PASSON PERFORMANCE "Stick-Shift" Champ!
2013 StickShift Challenge Winner@ Mopar Nationals!