Take a look under the machine, you will see a pump filter in black color. Use a wrench to unscrew the filter housing and your pump filter will appear. To continue, screw the clockwise to release the pump filter and then you can clean it several times.
Unfortunately, this filter also needs replacing after a particular time use! Similar to the steps you remove, for installing, you just need to screw the filter in anti-clockwise. After checking carefully, you can add a new filter housing back, and your machine is now ready to work the magic!