The fermentation lock or airlock is a device used in beer brewing and wine making that allows carbon dioxide released by the beer to escape the fermenter, while not allowing air to enter the fermenter, thus avoiding oxidation.
Most wood blinds are treated with a special finish to repel dirt and stains. Wood blinds can be cleaned with a good quality furniture polish and a soft cloth or clean sock. Spray the furniture polish on the cloth and wipe each slat individually. Avoid touching the cords. For heavier cleaning, you can use plain water, but be careful not to saturate the wood.
The #1 thing to do to protect yourself and your family from too dry air. Cold air entering your home heats up which leads to a drop in relative humidity. Ergo, air sealing, caulking and installing weather strips, is the most efficient way to maintain healthy, comfortable relative humidity levels in your house. The smartest thing to to is to nip the source of the dry air in the bud.