If it's stuck and it's supposed to move - spray WD-40 on it, if it's moving and it's not supposed to - duct tape it.
WD-40 has been around since 1953. It is a water displacer and light lubricant.
"WD-40 is the trademark of a widely used penetrating oil (cleaner, lubricant and anti-corrosive solution) developed in 1953 by Norm Larsen, then working for the Rocket Chemical Company, to eliminate water and prevent corrosion on electrical circuitry. It stands for 'Water Displacement, 40th attempt'. "
From the article on WD-40 in Wikipedia, the free encyclopedia
This is a link to the WD-40 website with more about the history of WD-40.
The company also sells other home fixer favorites like Lava soap and 3-In-One oil, as well as a selection of other lubricants/cleaners including spray on white lithium grease that looks like it would come in handy for some things.
