what do i do to my dishwasher?

my dishwasher does not clean the crockery since last week i have used the finish cleaner,checked the salt and the rinse aid, but the cups,glasses have marks,cutlery dont seem to be grease free.i have been using fairy tablet since a long time, havent changed anything or program. i have also checked for hot water. my dishwasher is intergrated about five years old. could you please help and resolve the problem. thank you. it is a cda494 model the crockery are not completly dry as before.