The Cyclone Filter Cleaner, manufactured by Darlly, is a great filter cleaner to use regularly.

Application:

Attach Cyclone to a hose using the hozelock connector. Add filter cleaning liquid into the chamber (Instant cartridge cleaner is quicker). Use the trigger and spray the cleaner/water mix into the filter using the brushes to remove any unwanted debris. Once the cleaning liquid has been used up leave the filter to stand for at least 1-2 hours (10 minutes with Instant Cartridge Cleaner). Leave the filter to dry overnight. 

Length: 270mm 

Width: 105mm (at widest point)

Note: Repeat this process on a monthly basis.