Tools & Techniques:
The proper cleaning of a hot tub begins with proper chemical treatment. Follow your manufacturers instructions, or see a pool or hot tub dealer for advice on treating your hot tubs with the appropriate chemicals. Remember to clean your filter on a regular basis. For example, clean the filter when you are cleaning your hot tub. Manufacturers would recommend filter cleaning more frequently, however it maybe more realistic to do so when cleaning your tub. To properly clean your hot tub you drain it completely so you can use a soft cloth or sponge to thoroughly clean the inside of the hot tub.
Use a manufacturer recommended product or mild detergent (Most tubs are acrylic, do not use anything abrasive). Rinse your tub before refilling to prevent soap suds when turning on your tub. The frequency of cleaning depends on the frequency of use, a general rule of thumb is once every three months.
Tips & Timesavers:
Body oils can be bothersome in hot tubs this is lessened by regular cleaning of the tub. You can buy a specialty product called a Zorbie which can be placed directly into your hot tub, it floats and it absorbs body oils keeping your tub that much cleaner.