If you need to descale the dishwasher, you should first check that the salt amount is set correctly. The dishwasher salt’s function is to soften the water - i.e. remove limescale from the water. And if the salt setting is correct, there should therefore be no need to descale the dishwasher. But if limescale deposits are present, then it will be necessary to descale the dishwasher.

If there is limescale in the dishwasher, you may need to descale.

Here's how to do it:
1. Empty the dishwasher
2. Fill the soap compartment
2. Run a wash at high temperature