D.J Healy, Obviously you're having some extreme problems. My DishDrawer is now past 12 years of age and has not had any such continual/recurring problems are you've experienced. I surely don't have to prewash or postwash anything. I would love to get a hands-on look at your machine and your usage habits to see what may factors may be contributing to your dissatisfaction. I'm in TX but about 5.5 hrs from DFW area. A couple months ago I noticed water leaking on the floor to varying degrees after running loads at various times in both the upper and lower drawers. Upon investigating I found that both drain hoses had developed cracks -- both were cracked behind the DishDrawer where they made a sharp bend toward the opening in the cabinetry partition to the sink plumbing, the lower hose was also cracked a few inches from where it attached to the pump. The drain hoses flex every time the drawers are open/closed so it's not unusual that a crack may occur after years of use. I have experience working on appliances so can DIY pretty much any repair (except refrigeration!). F&P parts are available from a couple online sources. The backlight on the upper drawer's LCD panel had gone out a year or so earlier (which didn't prevent the unit from working, the operational icons and cycle time were displayed, just not lit from behind) so I took the parts-order opportunity to replace it. There have been updates on the lid motors (mine were still working at 12 years) and hose/wiring supports (upper had broken a couple years ago, I patched it with a zip-tie) so I also got a kit package to update my older unit on those points. No other repairs for the 12-years duration to that point. Regards to cleaning performance, below are some examples of what I load-in and how it comes out. I didn't take these pictures just now, I have them on-hand from previous discussion posts. Baked chicken (sat for several days before washing). Boiled-over oatmeal with raspberry jam. Microwaved pasta & sauce.

ChiSue, The drain hoses flex every time the drawers are opened/closed but there's no immediate concern unless they're leaking. They're designed to be flexible but cracking at some point of aging is a fairly common thing. The fill hoses also flex but they're more of a stretchy/rubbery material than the drain hoses. My lower drawer drain hose had a crack a few inches behind the drawer. Both had cracks where they exit behind the unit and made a sharp turn toward the left through the cabinetry partition. Impossible to see back there when the unit is in place so I have no idea how much bend is in effect on the new hoses. :-| KA discontinued drawer dishwashers a few years ago. The only brand currently on the US market is F&P, and possibly DCS (which is owned by F&P). I considered updating to the latest model (tall upper drawer!) and the racking is more adjustable now ... but decided to fix the DD603.

Slightly tilted by propping up the right side corner as you show in the picture, with the unit partially pulled out of the cavity? Could be it's off-level or off-square when in place. The drawer-closed sensor is an optical gizmo at the upper right corner of the tub (behind the front panel) with a matching piece in the frame of the machine's outer cabinet. The drawer is not registered to be closed if the two channels of the optical sensor don't align.

Oh dadoes, I just saw your comment. I did get the specs and the DD requires 23 5/8" for the inner cavity. I've talked with a contractor who will be bidding on my kitchen facelift. He thinks I'll need to use a 27" cabinet. The walls of a 24" only leave 22.5" internal cavity and the cutout for the doors is only 21" wide. So, it looks like we'll be going with a 27" cabinet. I looked at the installation manual for the double DD, which does not require a cabinet. It just slides in between two cabinets, so there are no side walls or door/drawer cutouts to contend with. I still have to figure out what is the maximum sink depth, w/drain, that we can use to fit into the space above the DD. Any thoughts on that?