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Directions for installing vertical blinds.
Directions for threading wood slat blinds.
The method used to shorten venetian blinds is relatively simple and requires only a level and pair of scissors. The final length must be longer than the window you are covering so it is crucial that measure twice can cut once.
The easiest way to clean blinds is in the bathtub. Dish detergent cleans blinds well, or you can try a 1-to-1 mixture of water with borax, ammonia, or baking soda, as you prefer. Dryer sheets will help treat the blinds afterward.