Dishwasher problems? I previously posted a question roughly this subject and have tried every...

I previously posted a question roughly this subject and have tried every single tip compassionately posted back to me. I've checked the dishwasher inside out, its spotlessly verbs, I ran a mixture of commercial cleaners through it inc soda crystals. I check how all the plates and dishes are placed making sure nought is blocking the spray arms but still, the majority of any cups or dishes placed on the top shelf still have what appears to be a residue of sand inside them after the wipe up has finished. I also rinse everything formerly hand and use the rinse piece on the washer before using the hottest setting. I also use dishwasher saline and rinse aid.
Anyone have any concept why my stuff on the top shelf still comes out dirty and what is this sandy stuff because I'm at a complete loss?
Thanks.
Why will my dryer stop working and turn...
Answers:    The water softener is built into the appliance, so limescale its not. You mention you use 'dishwasher salt', no help for your prob right presently, but a tip for the future...you can bring water softener saline in DIY stores, so much cheaper, purely as good.
I suspect that you are not getting the right volume of sea into the machine, cause by blockages in the pressure sensing gallery, this will not allow the machine to rinse properly.When the piece of equipment is running 'at full speed', open the door, you should capture /see a good splash of dampen spraying out if you have adequate water....
Although my 'standard fix' for your problem is Washing Soda crystals,(and you hold tried it) there is no cost (other than 55pence) to putting another kilo bag through the device
These 'galleries' are quite dictatorial, and get gunged up well, then they are sons of batchelors to clear.....
A bottle of kerosene lamp grease spilled surrounded...
is it limescale that your picking up???