If backpack is very dirty, people can use neuter cleaner to clean knapsack, park in shady and cool place again air dry, but avoid insolate too long, because ultraviolet ray can hurt nylon cloth.The specific methods are as follows:
1. Clean the floating soil with a small brush, suitable for backpacks with only floating ash.2. With a soft towel dabbed with water to wipe, and then dry, suitable for common stains backpack.3. Soak in a large tub for a few days and rinse repeatedly.4. Tear down the back system, with the washing machine cleaning, suitable for a neat lazy
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