Have yet to find a forum for appliance problems/repair. My dishwasher has been leaving chalky residue and various scratchy particles on my dishes for months. When I use vinegar each time I run it, it really helps. I've tried several different detergents to no avail. Plus, it used to work fine with the same detergent I've always used. I checked the draining grate, cleaned it out, and it looked fine. Now the thing is rattling for an unknown reason. It's an 8 year old whirlpool. They are cheap enough to just buy a new one. However, I'd hate to buy a new one if I don't need to (more bucks for HT stuff!). Any suggestions on how to fix what I've got, or if I need to get a new one, what brands/features are essential? Thanks!