DISHES COVERED IN WHITE POWDER

Question

DISHWASHER IS CLEANED REGULARLY AND ALSO SALT AND RINSE AID MAINTAINED. BUT AM STILL GETTING A LOT OF WHITE POWDER AT THE END OF THE CICLE ON THE DISHES ETC.,

HAVE SET THE SETTINGS ON MAX AND TRIED DIFFERENT SETTINGS ALSO, USE FINISH RINSE AID AND TABLETS AND STILL EXPERIENCE SAME RESULTS. THIS HAS OCCURED FOR THE LAST MONTH.