Around the waterline deposits of debris, oils and greases can accumulate providing the ideal breeding ground for bacteria and making the spa look uninviting, (see Cleaning section). Surface Cleaner removes oils and greases improving the appearance of the spa and eliminating hidden microbes. Being a non-abrasive formulation means that there is no risk of damage to your spa finish and the invisible shield that Surface Cleaner leaves behind means that there is less build up of waterline deposits in the future.