Regardless of how careful you are about cleaning the tub itself, unless you flush out your jacuzzi jet system at least twice a month, it may be harboring bacteria. The jacuzzi jet system stores a small amount of water when it is not in use that is the perfect breeding ground for bacteria. Unless your jets are flushed with a disinfectant solution, that bacteria is released into the tub the next time you use your jets.
Turn each of your jacuzzi jets clockwise as far as they will go.
Close the drain of your jacuzzi tub and fill it with warm water until the highest jet is at least 2 inches underwater.
Add 20 oz. bleach and 2 tbsp. dishwasher detergent. Turn the jacuzzi jets on; run them for a minimum of 10 minutes.
Turn the jacuzzi jets off. Put on rubber gloves to open the tub drain. Use a large plastic pitcher to rinse the tub and remove any residue from the bleach and dishwasher detergent solution.
Wipe up any water drips from the top and outsides of your jacuzzi tub with a clean towel.