3. Use Vaseline to Keep Door Locks from Freezing

Estimated Cost: $1–$2* Goal: Prevents door locks from freezing during the winter
Even if winter has arrived, frozen door locks don't have to! Your secret weapon against this frequent cold-weather annoyance can be Vaseline. You can create a barrier that repels water and keeps it from freezing inside the mechanism of your door lock by putting a small bit of Vaseline inside the keyhole.
Use Vaseline to Keep Door Locks from Freezing (@MBOFOYH/YouTube)
This little method is especially useful for outside locks and automobile doors that are left outside in the weather. It's simple, affordable, and spares you the annoyance of having to deal with a frozen lock on frigid mornings. All winter long, a little Vaseline will keep your hair looking shiny and healthy, so you won't be left out in the cold!