How to self-clean your whirlpool tub ?

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.
-Let the water run out for a few minutes so that the ducts can be cleaned and thus remove any remains of dirt
This procedure avoids the accumulation of residues and dirt in the internal pipes of the whirlpool tubs.