I used to work at a dry cleaner. I noticed that the suction power was not normal. I know what to do. This filter is torn in half. It was so full of dirt. I took it outside and landed on the sidewalk. Now I found another problem. When we suck in small particles, this type of dirt easily enters the filter, thus preventing the engine from doing its job. You can stomp it outside on the sidewalk. You can run your finger over each of the grooves, you can also, although I haven't done it, repeatedly dip it in a bucket of warm soapy water to gently clean each groove with a soft toothbrush, and then dip it in cold water , then allow to air dry. In other words, these filters can be used over and over again. This bag is suitable for large white vacuum cleaner filters after you put the filter in the machine. I didn't use it to communicate what I think will happen. When I remove the bag I see a clean filter. If you want to pick up heavy materials, they won't clog the filter.
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