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.
A simple way to prevent dust mites in your bedding is to place a waterproof, breathable protector on your mattress and pillows. These type of covers are machine washable. Wash them as often as you wash your sheets, which is best every weekend. Dust mites need food and water to survive.