When wash dishes, there is gritty like food on all the dishes and we use liquid for cleaning dishes. I rinse all dishes before I place in unit.....what is the problem?

Check to make sure there is no food left at the bottom of the rack, then check to make sure you are adding the correct dishwasher soap that Samsung recommends to use with the dishwasher. If this is not working you could try using heavy duty dish washing cycle or try rinsing off your dishes before placing them into the dishwasher this reduces food buildup at the bottom of the dishwasher and helps clean your dishes better

1 Scrape and rinse dishes before putting them in your appliance. Small food particles, grease, sauces and bones clog up the system, keeping the dishwasher from properly rinsing your dishes. You don't need to prewash the dishes but be sure to rinse off any solids.
2 Use a toothbrush to clean around the dishwasher door.
Clean around the seal and hinges of the dishwasher. This area often is forgotten and holds a good deal of bacteria and food splash. A tooth- or bottlebrush is the best way to get into the crevices.
3 Clean chunks of food out of the screen and drain at the bottom of your dishwasher, recommended The Family Handyman. If the drain is plugged, the dirty water can't be washed away and ends up back on your dishes. Nut, bean and seafood shells, bits of plastic and small dishes can lodge against the drain, keeping it from doing its job.
4 Unclog the holes in the sprayer arms. If the holes are blocked by food or soap, water cannot freely spray inside the dishwasher to thoroughly clean the dishes. Leftover food on the dishes can make the dishwasher smell.
5 Keep space around your dishes. Overloading a dishwasher keeps it from running efficiently, allowing gunk to build up around the drain and the spray arms.
6 Run your dishwasher as hot as possible to break down food and grease. The recommended temperature is 120 F.
7 Run the dishwasher with vinegar added to neutralize odor. Empty the dishwasher, place a dishwasher-safe cup filled with white vinegar on the top rack, and run a cycle at the hottest setting. If you prefer, use unsweetened lemonade powder or baking soda in place of vinegar.

before loading the dishes rinse it first outside then wash the complete cycle and instead of powder use the liquid one

Try the cascade new soap they have been changing the ingredents due to state requirments for the water treatment. also make sure spray arms and jet are free from food particles,also clean soap dispencer,If you want run CLR through dish washer no dishes to clean machine.Thanks

if machine is fully operational, then it may be a detergent problem.
is your machine heating to proper temperture, is your machine rinsing ??

we had the same problem with a new dishwasher. The repair man told us that the liquid soap would froth too much and not fully rinse out of the system. So the food particles stayed in the trap and wouldn't rinse away. Also the drain hose needs to be looped up to the top of the dishwasher or ran directly down to drain so the wash water doesn't just drain back into the dishwasher. Also check you top rack water jets to see if there are food particles which move into the holes and block the water flow on that level. Hope this helps :-)

Hi and welcome to FixYa I am Kelly. One of the biggest causes of the symptom you describe is that there is a partial blockage of the drain. The blockage areas are most often in the "Air Gap" A device that looks like an inverted 5 oz Dixie cup on the back of the sink with no cone shape. Food particles collect in the very top of that and slow down the drain process. Because of that the dishwasher doesn't completely drain between cycles. So what you get is recycled previous cycle water in the rinse.

Other places where blockages occur are at the garbage disposal side inlet hole. And the last place is under the wash arm tower / mini riser in the pump impeller outlet area. To clean under the lower wash arm riser it requires diassembly and a good memory of how everything came apart / goes back together when your done cleaning.

Our Bosch does a pretty good job of washing dishes. But we rinse most of the time. Not a hard rinse, but a rinse.

Are both spray bars rotating? You can test by seeing that the bars rotate easily by hand, and also by starting a cycle and opening the door real quick when you hear the spray hit the door.

Make sure the spray bar nozzles are all clear.

Has it ever done a good job of cleaning dishes?

DI you leave a heavy build-up of food on the dishes, and allow it to dry before washing?

Dishwasher seems to cycle through but dishes are still dirty, like there is no water being sprayed?