Halo, everybody
 
I wander if anyone hasn't trouble with wintering using mediums. We living in latitude 54.5 dg. North (24 dg East ) do have. Last 2 years a frost  almost  reached a mark of 30 dg. Celsius. My "bee friend" often used to lose his bees. The reason was simple. Bees ate honey in low frames and could not find the upper ones. Maybe, they occurred at the top of the first frame right while frost? They died with plenty of food above. He tried to diminish a space among lower and upper frames. Nothing helped. He refused mediums and now has only deeps.
 
Such a story. Any suggestions?
 
A small bee keeper
Rimantas Zujus
Lithuania