Step one for ensuring you can use your hot tub throughout a harsh winter is to make sure you keep the hot tub cover clear of ice and snow.
Covers can become too heavy to lift with snow and ice on them. Too much snow and ice can damage the cover due to the excessive weight on the foam core cover. The longer you allow snow to accumulate on your hot tub cover, the less likely you are to even make an effort to enjoy your spa. Keep in mind, however, that if you’re not planning to use your hot tub often, small amounts of snow on top of the cover does add to the spa’s insulation characteristics.