I was thinking of either buying insulated hole covers for my traps, or getting new traps with the hole insulation built in. I had a hell of a time last year keeping up with ice locking up the reels on my tip-ups on some really cold days. Hoping the insulation will reduce hole maintenance. 
just needa check your traps more often.
One day a couple years ago was exceptionally horrid, and i didnt keep up with them throughout the day. when i went to pick the traps up i had at least 2" on my holes.
Told myself id never do that again... and i havent.
Have you tried filling your holes with snow? on some of the slower trout waters i fish, ill pack em with snow and they wont freeze up on me. just gotta take your time scooping it out when the flag does pop.
i dont know about you, but ive got enough stuff to drag onto the lake as it is.
