Using these packing cubes is a breeze. Start by sorting your items according to type, like clothes, toiletries, or accessories. Then, place them into the appropriate cube. The small cube is great for smaller items or for organizing a small section of your luggage, while the medium cube can hold bulkier items. When packing, try to roll your clothes instead of folding them to save space. As for maintenance, you can simply toss them in the washing machine whenever they get dirty. However, make sure to use a gentle cycle and mild detergent. Avoid using bleach or harsh chemicals as they may damage the recycled materials. After washing, let them air - dry. And always remember to keep the cubes dry when not in use to prevent mold and mildew growth.