Window clings are used to add color and decoration to windows. They stick to windows much like a sticker would, but they do not leave sticky residue when removed. In order for the clings to stick, the window must be clean as even a thin layer of dust can prevent it from sticking. Once washed, a cling should stick to a window until it is manually removed.
Moisten a clean washcloth with vinegar. A plain 5 percent white vinegar is all that is necessary.
Wipe the window clean with the washcloth. The vinegar will effectively remove any dust or dirt from the window.
Wipe the window dry with dish towel. Dish towels are best to use as they are less likely to leave cloth fibers on the glass.
Hold a finger under running water. Rub your damp finger on the sticky side of the window cling. The small amount of moisture will help it stick to the window.