Q. I heard that I should keep thread in the freezer. Is that right?
A. No! Thread should never be stored in the freezer. Freezing dehydrates everything. That's why food lasts so much longer in a freezer than in does out in the open. But thread does not expire like food.
The worst thing for thread is long-term exposure to sunlight. Direct sunlight can cause colors to fade and weaken fibers. Dust buildup on on a spool or cone will clog up the machine as the thread passes through it.
The best method to store thread is out of direct sunlight and away from heat or air conditioning vents. Drawers and bags are just fine for thread storage. We like to wrap our cones in HandyNets to keep the thread from unwinding.