Dishwashers - do you need rinse aid and salt??

[wickedfairy]

Hi, we have our first dishwasher, it has been in about 6 months. The dishes are starting to come out not completely clean and the glasses are water marked. We just use one of the Lidl tablets (although occasionally the little flip drawer doesn't open, which would explain the not completely clean dishes but that's another story, I suppose....)

We live in Nort West (South Manc area) and DH says we don't need rinse aid/salt because the water is not hard. I have no idea, but we're certainly lacking something!!

Can someone please advise? I am not from around here, so have no idea what the water is like and even if I did, I would have no idea about the whole dishwasher thing anyway! Advise would be most gratefully received . Thanks!

my last dishwasher had a little cap that you removed to put the rinse aid in - it was on the door of the machine next to where the tablet/powder goes. My current one has a little flap you open to pour the rinse aid into - again it is on the door next to the compartment for tablet/powder

Thanks both. I need to go and investigate...

Lidl sell rinse aid and salt very reasonably. I use that and get good dishwasher tablets when they are on offer if I can. It does make a difference but we have hard water.