Using these Bosch VB000P plastic dust bags is easy. First, make sure your dust extractor is turned off and unplugged. Open the canister of your VAC090 or VAC140 series dust extractor and place the plastic bag inside. Close the canister and you're ready to start vacuuming. Remember, these bags are only for dry materials, so don't use them to vacuum up wet stuff. When the bag is full or when you're done cleaning, turn off the extractor and unplug it. Open the canister and carefully remove the bag. Tie it up and throw it away for a clean and easy disposal. To keep your dust extractor working well, regularly check the bags for tears or damage. Replace them as needed to ensure efficient dust extraction.