Using this filter is easy. Just open your Vorwerk Kobold VK130 or VK131 vacuum cleaner, remove the old filter, and put in the new one. Make sure it's properly installed. As for the frequency of use, there's no special requirement. Just use your vacuum cleaner as you normally would. When it comes to replacement, remember to change the filter every 2 - 3 years. This will help your cleaner last longer. Also, keep the filter in a dry and clean place to maintain its performance. Don't expose it to extreme temperatures or moisture. If you have any other questions, feel free to contact us.