Indesit dishwasher DE73 not washing well

[coolcresta]

Hi this machine is not giving a good wash, plates have a gritty feel and some cups/plates in the upper basket still have slight food residue.
I have had this before with this machine and found the upper basket spray bar feed pipe seal was worn out causing loss of pressure. Although only slightly worn this seal was replaced but the problem persists, the bottom filter is clean.
The spray bars seem very loose on their mountings and there are don't appear to be any seals inside the connections, should there be ? or are they just worn causing leakage and loss of pressure ?
Any thoughts appreciated.
Peter

 

[rocks1]

Check the ring nut at the back of the tub it's poss worn then replace spray arms they are cheap enough.

 

[rocks1]

Check the ring nut at the back of the tub it's poss worn then replace spray arms they are cheap enough.

 

[coolcresta]

Already replaced the seal nut, will replace spray bars, thanks.