How to reset Flow after colony dies

Might need a few more details and some pictures.

But if it is just wax and honey no pests or slime or decay and the colony death wasn’t anything “unusual” then you can reuse them.

Recycling old frames

If you’re talking about flow frames - in your climate I do think anyone would recommend leaving the frames on over winter. Not sure what their state is, but they may need cleaning, light or deep…

Cleaning flow frames