I use cheap rinse aid in my Bosch, it's residual heat drying, so some items like plastic stuff that don't retain much heat, usually doesn't dry well without. It's got a built in softener unit being a UK model. The tap water hardness here is about 340mg/l (I think that's about about 19 grains hardness)
My previous one had proper hot air drying with an exposed element in the tub, and as I recall tended to leave a few spots and also not fully dry everything if it had ran out of rinse aid.
I used powder dishwasher detergent in my last dishwasher, rather than the modern "all-in-one" finish ultimate or Fairy Platinum capsules I use in my current one. I can't get dishwasher powder these days and budget tablets became totally useless when they phased out phosphates, some I tried even left grey deposits (Zeolite?) on stainless steel items, plus I don't think the built in softener works quite as well after 20 odd years use.
My previous one had proper hot air drying with an exposed element in the tub, and as I recall tended to leave a few spots and also not fully dry everything if it had ran out of rinse aid.
I used powder dishwasher detergent in my last dishwasher, rather than the modern "all-in-one" finish ultimate or Fairy Platinum capsules I use in my current one. I can't get dishwasher powder these days and budget tablets became totally useless when they phased out phosphates, some I tried even left grey deposits (Zeolite?) on stainless steel items, plus I don't think the built in softener works quite as well after 20 odd years use.