Hot answers tagged locks
There is de-icer you can use. Here is an example from Loctite. Spray it in the lock. It will keep it from sticking as well as ease how much torque it takes to turn the key. If this doesn't help you, there is a mechanical problem with the door linkage.
Door locks becoming hard to operate occurs around the world in very cold weather. The humidity in the air causes icing, metal components contract and 'jam' mechanisms, plastic components go 'hard' and refuse to slide. There are sprays available, heated key tools, and other gadgets aimed at helping or avoiding it happening, with varying degrees of success. ...
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