Using this reusable cloth vacuum bag is easy. First, make sure your vacuum cleaner is turned off and unplugged. Then, open the dust bag compartment of your Cleanstar Housemaid VC10LPH, Pullman AS4, or PC4.0. Take out the old bag (if there is one) and insert the new CB927 bag. Make sure it is properly fitted using the plastic fittings. When it comes to cleaning, simply remove the bag from the vacuum cleaner and shake it out outdoors. You can also wash it gently with mild soap and water if it gets really dirty. Let it dry completely before using it again. As for maintenance, check the bag regularly for any signs of wear and tear. If you notice holes or significant damage, it's time to replace it. Also, don't overfill the bag as it may affect the performance of your vacuum cleaner and reduce the bag's lifespan.