Note 1: Biggest culprit ... hair clips, cocktail sticks and coins.
Note 2:You might want to put some newspaper / rags on the floor as this will be messy.
1. To remove kick panel - tip machine back so you can see underneath and use a flat head screwdriver to praise off the panel
2. Use a pliers to unscrew filter cap (anti clockwise).... With the cap off you will see the insert that is designed to catch and hold debris.
3. Squeeze the Insert arms together and remove to wash and clean.
4. Clean our the filter chamber before first replacing the insert and then the cap.
5. As this will probably be the first time you have cleaned the filter .... put a wash through and repeat the filter cleaning process.
Note: you should probably clean the filter a couple of time a year ...