When water is in the 30’s temp, sometimes ice fishing techniques pays off. Ever stand a hole you have drilled in the ice and just picked up the rod a few inches, let the bobber drop back into the hole and rest? A very mild presentation in extreme cold water might be the only way to entice a bite sometimes even tho,,your fishing out of a boat in open water with no ice and it’s colder as heck out. A lot of guys in the winter tip their jigs with mousies and bee moths fishing this time of the year also.