When debris accumulates to the point where filtration efficiency is affected, a spa owner is faced with increased operating costs and poor water quality. Backwashing or cleaning becomes more frequent, increasing water and chemical usage, whilst poorer filtration increases chemical consumption in an effort to compensate. Cleaning is a vitally important part of the spa maintenance process. Simply draining and refilling a spa may well reinfect the new water with the same ‘old’ germs. Cleaning involves regular treatment of all pipelines prior to draining, purging of ‘old’ water from all pipelines, washing and polishing the shell using a surface cleaner, cleaning debris out of the skimmer and the lint trap and chemically cleaning the filter. Doing this improves bather comfort, reduces skin and eye irritation, improves water clarity and enhances the performance of sanitisers and oxidisers.