Ice caked window buckles

[C&c]

Our yurt is in the wester Maine mountains where the temps plummet in the winter. My challenge is that once the yurt warms up water flows down the outside walls and our window buckles upper and lower straps get encased in ice. When it's time to leave we often cannot close the outer flaps completely. It's not ideal to leave them flapping in the wind. I've been thinking of making a plastic sleeve to fit over the buckles. Anyone solved this problem already? Thanks!