Here are the steps to follow to activate the self-cleaning function on whirlpool tubs that have this option:
-Empty the bathtub completely after using the bath. -Choose the water flow selector to let the water flow out of the jets. -Turn the flow selector to let the water flow out. -Allow the water to circulate for a few minutes so that the pipes can be cleaned to remove any debris. This procedure avoids the accumulation of residues and dirt in the internal pipes of the whirlpool tubs.