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.
What is the easiest way to clean painted wood shutters? Is there something you can do to keep the dirt off afterward? -- Charla Upton, San Diego. Oh, how I wish there were. It is a fact of life that dirt and dust just come back! But there's an easy way to clean wood shutters: with a vacuum cleaner. Using the soft-brush head attachment, tilt the slats up and gently vacuum; then turn them down and run the brush over the slats as well as along the tops and bottoms of the shutters.