It needs to be 100% NaCl, and cooking salts often have anti-caking agents to stop them from clumping together. Crystale Dishwasher Salt for Dishwashers and Water Softeners is the purest dishwasher salt on the market and ideal for both dishwashers and water softeners. Keeping your dishwashers salt reservoir topped up with salt will aid water softening and helps avoid limescale marks on your glassware and limescale build-up in your machine, prolonging its life and improving its performance.

Hard water can cause glasses to become cloudy over time, as well as clog up the insides of your dishwasher with limescale. On a box of Finish dishwasher salt you’ll see ‘100% better protection’, but if you read further you’ll see this isn’t compared to other dishwasher salts; it’s only compared to not using salt at all. Whenever you're topping up the salt in your dishwasher you're aiming to make a saltwater brine, so you don't want to fill it up to the point that the water inside is overflowing. If you think you're having to refill it too often then you could try lowering the water hardness setting on your dishwasher.Deliveries are made Monday to Friday between 8am and 6pm. DPD Local provides a one hour delivery window on the day of delivery so you can carry on with other parts of your day as normal. As an international leader in parcel delivery, DPD Local offers you, our valued customer, a first-class delivery service. DPD Local is devoted to delivering the best parcel service, and we are proud they have been awarded the Queen’s Award for Enterprise for their unique one hour delivery service. With route optimisation, unbeatable safety protocols and exceptional efficiency we are sure you will be pleased with your delivery service.

You could have to refill the salt every month if you live in a hard water area and run your dishwasher often.

The calcium and magnesium swap with the sodium ions, removing the ‘hardness’ and softening the water. So any anti-caking agents or magnesium salts will just defeat the purpose of removing magnesium. Never put salt into other spots marked for normal detergent, dishwasher cleaner or rinse aid, as this could easily break your appliance. How to use rinse aid If you've done this, then rinsing it with water can help make sure the softener doesn't get clogged with salt. Why is the dishwasher salt reservoir full of water?