How do you get windows open that have been sealed shut with caulking?

by Cheryl

I recently bought an older home and didn't realize that the windows had been sealed shut with clear caulking. The windows are metal. I've tried box knife, screwdriver, etc. Apparently when the windows were open, caulk was spread into the track then the window was closed. Help, I need to know how to remove caulk!

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