The use of soap, oils, shampoos and other products during bathing can cause this problem and this can be solved as follows:
Fill the bathtub with lukewarm water.
Add 1 tablespoon of liquid dish detergent.
Start the system and let it run for 10 minutes.
Empty the tub, refill with cold water and run for another 5 minutes.
This process must be repeated until the water coming out of the jets is clear.
When this is done at regular intervals, the problem should not repeat itself.