- Remove cartridge from spa and hose of any loose debris.
- Fill a clean plastic bucket, large enough to completely immerse the cartridge element, with clean water.
- Add 1 litre of Cartridge Cleaner for every 20 litres of water in the bucket.
- Carefully immerse the cartridge element in the solution and allow it to soak overnight or for at least 8 hours.
- Remove cartridge element from the solution and rinse thoroughly with fresh water.
- For best results allow the cartridge element to dry before returning it to service.